Recent Topics
Relationship between VI and VII
by OilUzer
04/24/18 01:39 AM
News in Kansas
by Marco620
04/24/18 12:11 AM
Amsoil EAO 80 Cut Open (26500 miles)
by A310
04/23/18 11:29 PM
1965 Buda D175 Rotella 15W40
by A310
04/23/18 11:16 PM
So... kinda mad at Ford right now!
by SubieRubyRoo
04/23/18 10:20 PM
Mopar MO-349, 6k miles - C&P
by webfors
04/23/18 08:50 PM
2005 Accord V6 Steering Wobble (low speed only)
by JEL01
04/23/18 08:34 PM
EcoTec Filter suggestions?
by GMWeber
04/23/18 08:21 PM
Occasional brake noise??
by blupupher
04/23/18 08:11 PM
Ford Duratec 2.5L - 5w-20 vs 5w-30?
by dogememe
04/23/18 08:03 PM
New tires quicker to feather?
by supton
04/23/18 07:38 PM
mc fl500S CUT OPEN
by car51
04/23/18 07:34 PM
ACDelco UPF 64 CUT OPEN
by car51
04/23/18 07:26 PM
New Rotellas.. late to the game ...
by webfors
04/23/18 07:23 PM
2012 Ram 2500 Diesel Balljoints
by Bighorn2500
04/23/18 07:21 PM
Pennzoil Synthetic 19.97
by Marco620
04/23/18 07:07 PM
Received Pennzoil Rebate Check
by klt1986
04/23/18 07:02 PM
Any electrical engineers here?
by Reddy45
04/23/18 06:31 PM
Debating an engine weight for Q50 RedSport
by BullittGT
04/23/18 06:29 PM
Why Less Love For Mobil 1 ?
by ChrisD46
04/23/18 05:50 PM
Newest Members
vvillarr, initialjc, rickpa1, CoolShirtDude, Gee_Luva
64829 Registered Users
Who's Online
24 registered (Crispysea, 1WildPig, DeafBrad, Cornershop, ctechbob, 2 invisible), 588 Guests and 37 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
64829 Members
68 Forums
282233 Topics
4711844 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 8 1 2 3 4 5 6 7 8 >
Topic Options
#4452942 - 07/08/17 12:18 AM List of oils by base-oil-quality index: a ranking
Gokhan Offline


Registered: 12/29/10
Posts: 2955
Loc: Los Angeles, California
One of the ultimate questions asked on BITOG is the base-oil quality. Is a full synthetic any better than a conventional? What about a synthetic blend? How do major brands compare to third-party, store, and other brands? Are you always getting what you are paying for?

While there is no simple way of defining or measuring base-oil quality, there is one method that is useful and quantitative. Two of the most important quantities that depend on the base-oil quality are the dynamic viscosity at -30 °C (DV-30, cold-cranking simulator [CCS] viscosity) and the NOACK volatility. Both are inversely proportional to the base-oil quality and it's crucial that they must be used together to judge the base-oil quality, as thicker oils with higher DV-30 will have lower NOACK volatility regardless of their base-oil quality.

Therefore, I define the base-oil-quality index (BOQI) as follows:

BOQI = (2,000,000)/(DV-30)/(NOACK)

Here the unit for the DV-30 is cP and the NOACK volatility is expressed as a percentage. 2,000,000 is a number I chose so that the highest base-oil-quality indexes (BOQIs) approach 100, while it's still possible to have numbers above 100.

Note again that this is in no ways the absolute method of quantifying the base-oil quality. However, it's very quantitative. Also, the NOACK volatility usually have about +/-2% error and therefore the BOQI values will also have +/-2% error.

Another caveat is that DV-30 values are reported only for 5W-xx oils. You can also define the BOQI index for 0W-xx oils but since they report DV-35 for them, you cannot directly compare a 0W-xx (or 10W-xx, 15W-xx, etc.) oil to a 5W-30 oil using the BOQI, as you don't have the DV-30 numbers for these oils. Nevertheless, in principle if you can find them, you could.

The data was all taken from the independent PQIA. No manufacturer data was used to eliminate doubts about the authenticity of the data.

Last but not least, the base-oil quality alone doesn't dictate the overall oil quality. Detergents, additives, friction modifiers, and the viscosity-index improver are equally important.

With all this said, here is a brief summary:

(1) Shell Oil Products USA (SOPUS) excelled in the base-oil-quality index (BOQI).

(2) The discontinued Pennzoil Ultra is the all-time champion by far.

(3) Quaker State did very well.

(4) Since in 2013 Shell was using surplus GTL in Pennzoil Yellow Bottle and Quaker State Advanced Durability conventional oils, they excelled in BOQI. These oils were premium GTL full synthetics despite being sold as conventional.

(5) ACDelco Synthetic Blend made by ExxonMobil did extremely well.

(4) Mobil 1 did well but not nearly as good as Shell oil products.

(5) Formula Shell Synthetic was another surprisingly high performer.

(6) Almost all Synthetic Blends, including Ford Motorcraft, did poorly, scoring in the vicinity of lowest-quality conventional oils. I would avoid synthetic blends in general, as they seem to be a scam. They seem to be the lowest-quality conventional oils mixed with a very small amount of Group III or IV. There are a very few exceptions though.

(7) Some store brands did incredibly well.

(8) The highly popular (thanks to its bargain price) Shell Rotella T6 Full Synthetic 5W-40 did very poorly. Despite being sold as a full synthetic, it performed as a typical conventional oil. Don't expect high performance from it if you use it. Its BOQI in the range of conventional oils explains its bargain price.

(9) Valvoline White Bottle, Phillips, Kendall, Unocal, CITGO, and Walmart Supertech were among poor performers.

(10) Any oil that has a BOQI of about 22 or less should be avoided. Oils with the BOQI in the low 20s or less than 20 tended to fail the PQIA tests.

Here are the full results. The unit for DV-30 is cP and NOACK is a percentage. The base-oil quality-index (BOQI) is a dimensionless quantity and can in principle exceed 100. Note that the base oil may vary wildly with the manufacture date.

Code:
Rank	BOQI	DV-30   NOACK   Date    Oil

1	79.2	3,827	6.60	2013	Pennzoil Ultra™ 5W-30 API SN ILSAC GF-5
2	70.1	4,389	6.50	2013	Pennzoil API SN, ILSAC GF-5, SAE 5W-20 motor oil. (Yellow Bottle)
3	63.8	4,017	7.80	2013	Quaker State API SN, ILSAC GF-5, SAE 5W-20 motor oil. (Advanced Durability)
4	57.5	3,996	8.70	2016	Quaker State Ultimate Durability Full Synthetic SAE 5W-30 dexos1
5	54.3	4,184	8.80	2013	Quaker State Ultimate Durability™ 5W-30 API SN ILSAC GF-5
6	53.9	4,080	9.10	2014	Pennzoil Platinum Full Synthetic Motor Oil API SN, ILSAC GF-5, SAE 5W-30 motor oil. (PurePlus)
7	51.8	4,884	7.90	2014	AC Delco API SN, ILSAC GF-5, SAE 5W-30 motor oil. (Synthetic Blend)
8	51.8	4,154	9.30	2013	Pennzoil Platinum® 5W-30 API SN ILSAC GF-5
9	51.6	3,998	9.70	2013	Formula Shell Synthetic 5W-30 API SN ILSAC GF-5
10	50.4	4,271	9.30	2016	O'Reilly Full Synthetic SAE 5W-20 dexos1
11	50.3	3,937	10.10	2013	Mobil 1 5W-30 API SN ILSAC GF-5
12	47.3	4,544	9.30	2017	MILESYN SXR SAE 5W-20 Full Synthetic Engine Oil
13	46.9	4,180	10.20	2016	Meijer Full Synthetic SAE 5W-20
14	44.9	3,352	13.30	2013	Havoline Synthetic, API SN, ILSAC GF-5, SAE 5W-20 motor oil.
15	43.4	4,431	10.40	2013	Auto Extra  Full Synthetic 5W-30 API SN ILSAC GF-5
16	43.3	4,614	10.00	2015	LubriGold SAE 5W-30 Full Synthetic dexos1
17	42.5	4,358	10.80	2013	ENEOS Fully Synthetic 5W-30 API SN ILSAC GF-5
18	41.1	4,155	11.70	2016	Castrol Edge Full Synthetic SAE 5W-20 dexos1
19	41.0	5,744	8.50	2017	Navi Guard Ultra SAE 5W-20 Full Synthetic
20	40.9	4,941	9.90	2013	Schaeffer's Supreme 9000™ Full Synthetic Motor Oil 5W-30 
21	39.8	4,329	11.60	2013	Valvoline SYNPOWER™ 5W-30 API SN ILSAC GF-5
22	39.6	3,881	13.00	2013	Havoline Synthetic 5W-30 API SN ILSAC GF-5
23	39.4	4,924	10.30	2015	STARFIRE SAE 5W-20 Full Synthetic dexos1
24	39.2	4,512	11.30	2013	LUKOIL Full Synthetic Motor Oil 5W-30 API SN ILSAC GF-5
25	38.7	4,576	11.30	2013	Super Tech  Full Synthetic 5W-30 API SN ILSAC GF-5
26	38.7	3,860	13.40	2017	Chevron Havoline Pro DS SAE 5W-20 Full Synthetic Motor Oil
27	38.6	4,179	12.40	2013	FRAM Full Synthetic 5W-30 API SN ILSAC GF-5
28	38.6	4,892	10.60	2016	AutoQuest Full Synthetic SAE 5W-30 dexos1
29	38.3	5,019	10.40	2016	Royal Purple Synthetic Oil SAE 5W-20 High Performance Motor Oil
30	38.2	5,453	9.60	2013	LubriGold® Synthetic  5W-30 API SN, ILSAC GF-5, Dexos™
31	37.7	5,590	9.50	2017	Royal Purple Synthetic Oil SAE 5W-20 High Performance Motor Oil
32	37.2	5,599	9.60	2016	Race Pro Platinum Full Synthetic "SAE 5W20"
33	37.1	4,945	10.90	2013	Amsoil OE 5W-30 API SN ILSAC GF-5
34	36.7	5,090	10.70	2013	Kendall GT-1 Full Synthetic with Liquid Titanium 5W-30 API SN ILSAC GF-5
35	36.1	5,479	10.10	2014	Mobil 1 High Mileage Motor Oil SAE 5W-30, API SL
36	35.9	4,604	12.10	2013	Traveller Full Synthetic 5W-30 API SN ILSAC GF-5
37	35.8	5,126	10.90	2014	Valvoline MAX Life High Mileage, API SN, ILSAC GF-5, SAE 5W-30 motor oil.
38	35.0	4,612	12.40	2016	Preferred Choice Synthetic Blend SAE 5W-30 High Performance Motor Oil
39	34.7	4,611	12.50	2016	AutoZone Full Synthetic SAE 5W-20 dexos1
40	34.3	5,069	11.50	2016	AutoPride SAE 5W-30 All Season Motor Oil
41	33.3	5,411	11.10	2013	NAPA Synthetic Maximun Engine Protection 5W-30 API SN ILSAC GF-5
42	33.2	4,152	14.50	2014	National Motor Oil API SN, ILSAC GF-5, SAE 5W-30 motor oil.
43	33.0	5,562	10.90	2013	Royal Purple® Synthetic Oil 5W-30 API SN ILSAC GF-5
44	32.7	4,781	12.80	2017	Sheetz Premium Motor Oil SAE 5W-20
45	32.5	5,544	11.10	2013	Castrol Edge® 5W-30 API SN ILSAC GF-5
46	32.3	5,031	12.30	2016	Quantum X-5 Max-Blend Semi-Synthetic Motor Oil
47	32.1	4,156	15.00	2014	Marathon Motor Oil API SN, ILSAC GF-5, SAE 5W-30 motor oil.
48	32.1	5,832	10.70	2014	Valvoline NextGen API SN, ILSAC GF-5, SAE 5W-20 motor oil.
49	32.0	5,487	11.40	2015	Quaker State SAE 5W-30 Advanced Durability
50	31.9	5,177	12.10	2015	7-Eleven Motor Oil SAE 5W-30
51	31.7	5,436	11.60	2013	Mobil Super™ Synthetic 5W-30 API SN ILSAC GF-5
52	31.4	4,856	13.10	2017	Marathon SAE 5W-20 Performance Series Motor Oil
53	31.4	5,053	12.60	2017	StarFire SAE 5W-20
54	31.3	4,293	14.90	2013	Lucas® Synthetic 5W-30 API SN ILSAC GF-5
55	31.1	5,544	11.60	2017	O'Reilly SAE 5W-20
56	31.0	5,038	12.80	2017	CarQuest SAE 5W-20 Full Synthetic
57	30.9	5,782	11.20	2015	American XT Premium SAE 5W-30 High Mileage Motor Oil
58	30.8	5,553	11.70	2013	Proline® Full Synthetic Motor Oil 5W-30 API SN ILSAC GF-5
59	30.6	5,230	12.50	2017	Chevron Havoline SAE 5W-20 Motor Oil
60	30.6	5,595	11.70	2017	Kum & Go SAE 5W-30 Full Synthetic dexos1 Motor Oil
61	30.2	5,480	12.10	2016	Mobil Super Premium Motor Oil SAE 5W-20
62	30.1	5,828	11.40	2017	Zecol-Max Synthetic, Semi-Synthetic SAE 5W-20 Motor Oil
63	30.1	5,323	12.50	2017	AutoQuest by meijer SAE 5W-20 Conventional Motor Oil
64	30.0	5,643	11.80	2015	Zecol-Max Semi-Synthetic SAE 5W-30
65	29.7	5,426	12.40	2015	MAG 1 Motor Oil SAE 5W-20
66	29.6	5,815	11.60	2017	Castrol GTX SAE 5W-20 Motor Oil
67	29.5	5,432	12.50	2017	Preferred Choice Synthetic Blend SAE 5W-20 High Performance Motor Oil
68	29.5	5,264	12.90	2013	SuperS Multi Flo Synthetic  Blend API SN, ILSAC GF-5, SAE 5W-20 motor oil.
69	29.1	5,324	12.90	2016	Smart Living SAE 5W-30 Premium Motor Oil
70	29.0	5,229	13.20	2016	Certified Performance Engineered SAE 5W-30 Motor Oil
71	29.0	5,396	12.80	2016	Speedway SAE 5W-20 Motor Oil
72	28.9	5,400	12.80	2014	Warren Motor Oil API SN, ILSAC GF-5, SAE 5W-20 motor oil.
73	28.8	5,463	12.70	2016	Kum & Go Synthetic Blend SAE 5W-20 Motor Oil
74	28.7	5,523	12.60	2015	PROLINE SAE 5W-20 All Season Motor Oil
75	28.7	5,407	12.90	2014	Kangaroo Express Motor Oil SAE 5W-30, API SN, ILSAC GF-5
76	28.6	5,339	13.10	2016	Pennzoil Motor Oil SAE 5W-20
77	28.5	5,534	12.70	2016	Valvoline Max Life High Mileage Synthetic Blend SAE 5W-20, dexos1TM
78	28.1	5,237	13.60	2014	HESS Motor Oil SAE 5W-30, API SN, ILSAC GF-5
79	28.0	6,010	11.90	2016	RaceTrac RPMaximum SAE 5W-30 Performance Rated Motor Oil
80	27.9	4,777	15.00	2014	CAM2 SuperPRO Max Motor Oil SAE 5W-30, API SN, ILSAC GF-5
81	27.9	5,687	12.60	2014	Quaker State DEFY API SL SAE 5W-30 motor oil.
82	27.8	5,136	14.00	2013	Castrol GTX API SN, ILSAC GF-5, SAE 5W-20 motor oil.
83	27.7	6,214	11.60	2015	PENTO SUPER PERFORMANCE III SAE 5W-30 Motor Oil 
84	27.7	5,973	12.10	2016	PETROMERICA SAE 5W-30 Synthetic Blend Motor Oil
85	27.6	5,700	12.70	2016	Sinclair Supreme SAE 5W-30 Motor Oil
86	27.4	5,539	13.20	2014	Speedway API SN, ILSAC GF-5, SAE 5W-20 motor oil.
87	27.3	6,048	12.10	2016	Castrol GTX Motor Oil SAE 5W-20
88	27.1	5,761	12.80	2017	MidWest Guard SAE 5W-30 Synthetic Blend Motor Oil
89	27.0	5,562	13.30	2017	CITGO SUPERGARD SAE 5W-30 Synthetic Blend
90	27.0	5,615	13.20	2015	Chevron Havoline SAE 5W-20 Motor Oil
91	26.9	5,304	14.00	2016	LUKOIL SAE 5W-20 Synthetic Blend Motor Oil
92	26.7	5,582	13.40	2017	Signature Home SAE 5W-30 Premium Motor Oil
93	26.7	5,586	13.40	2017	Prime Guard SAE 5W-20 Synthetic Blend Motor Oil
94	26.7	5,950	12.60	2017	Chevron Supreme SAE 5W-20 Motor Oil
95	26.5	5,664	13.30	2013	Auto Exra API SN, ILSAC GF-5, SAE 5W-20 motor oil.
96	26.5	5,316	14.20	2013	CAM2 Super Pro MAX API SN, ILSAC GF-5, SAE 5W-20 motor oil.
97	26.4	5,482	13.80	2015	Wolf's Head SAE 5W-30 Motor Oil Super-Duty Semi-Synthetic
98	26.4	5,650	13.40	2016	CITGO SUPERGARD SAE 5W-20 Synthetic Blend
99	26.4	5,737	13.20	2015	DuraMAX Liquid Armor SAE 5W-30 Synthetic Blend
100	26.4	5,662	13.40	2013	Traveller Premium API SN, ILSAC GF-5, SAE 5W-20 motor oil.
101	26.3	5,471	13.90	2014	Super S Multi Flo High Mileage Motor  Oil API SN, ILSAC GF-5, SAE 5W-30
102	26.3	5,471	13.90	2014	Super S Multi Flo High Mileage Motor  Oil API SN, ILSAC GF-5, SAE 5W-30
103	26.2	5,332	14.30	2016	PROLINE SAE 5W-20 All Season Motor Oil
104	26.0	6,008	12.80	2015	Shell Rotella T6 Synthetic SAE 5W-40, API CJ-4, CI-4, CI-4 Plus, CI-4, CH-4, CG-4/SM
105	26.0	5,538	13.90	2013	Mobil 5000 API SN, ILSAC GF-5, SAE 5W-20 motor oil.
106	25.9	5,281	14.60	2013	Atlas Team Clear Blend API SN, ILSAC GF-5, SAE 5W-20 motor oil.
107	25.9	5,772	13.40	2014	NAPA High Mileage, API SN, ILSAC GF-5, SAE 10W-30 motor oil.
108	25.8	5,283	14.70	2013	Proline API SN, ILSAC GF-5, SAE 5W-20 motor oil.
109	25.7	5,284	14.70	2015	Quaker State Advanced Durability SAE 5W-30
110	25.7	5,646	13.80	2013	Sheetz Premium API SN, ILSAC GF-5, SAE 5W-20 motor oil.
111	25.7	5,860	13.30	2014	Service Pro  API SN, ILSAC GF-5, SAE 5W-20 motor oil.
112	25.6	6,154	12.70	2015	Safeway SAE 5W-30 Premium Motor Oil
113	25.6	5,790	13.50	2014	Ace Motor Oil, API SN, ILSAC GF-5, SAE 5W20 motor oil.
114	25.6	5,790	13.50	2014	Ace Motor Oil, API SN, ILSAC GF-5, SAE 5W20 motor oil.
115	25.4	5,668	13.90	2016	LMX SAE 5W-20 Premium Motor Oil
116	25.4	5,472	14.40	2015	Peak SAE 5W-30 Conventional Motor Oil
117	25.4	5,594	14.10	2014	Mobil Super High Mileage Motor Oil API SN, ILSAC GF-5, SAE 5W-30 motor oil.
118	25.2	6,049	13.10	2015	Star Fire SAE 5W-20 Synthetic Blend Motor Oil
119	25.0	5,875	13.60	2014	Pennzoil High Higher Mileage, API SN, SAE 5W-30 motor oil.
120	25.0	5,566	14.40	2017	Sunoco Ultra SAE 5W-20 Premium Motor Oil
121	24.9	6,028	13.30	2015	RK SAE 5W-30
122	24.9	5,624	14.30	2013	CAM2® SYNAVEX™  5W-30 API SN, ILSAC GF-5 (Full Synthetic)
123	24.7	5,360	15.10	2013	Formula Shell   API SN, ILSAC GF-5, SAE 5W-20 motor oil.
124	24.6	6,266	13.00	2015	Casey's General Store SAE 5W-30
125	24.5	5,590	14.60	2015	Essential Everyday SAE 5W-30
126	24.5	5,555	14.70	2013	Autozone API SN, ILSAC GF-5, SAE 5W-20 motor oil.
127	24.5	6,141	13.30	2014	Castrol GTX High Mileage Motor Oil API SN, ILSAC GF-5, SAE 5W-30 motor oil.
128	24.4	5,975	13.70	2014	RacePro Motor Oil API SN, ILSAC GF-5, SAE 5W-20 motor oil.
129	24.1	5,489	15.10	2014	O'Reilly High Mileage Motor Oil SAE 5W-30, API SN, ILSAC GF-5
130	24.0	6,208	13.40	2014	Duplex Motor Oil API SN, ILSAC GF-5, SAE 5W-30 motor oil.
131	24.0	5,595	14.90	2013	Advance Auto Parts API SN, ILSAC GF-5, SAE 5W-20 motor oil.
132	24.0	6,225	13.40	2017	Premier SAE 5W-30 Motor Oil
133	23.9	6,528	12.80	2017	Vantage 5W-30 SAE Synthetic Blend Oil
134	23.9	5,617	14.90	2013	O'Reilly API SN, ILSAC GF-5, SAE 5W-20 motor oil.
135	23.9	5,936	14.10	2014	Murphy USA Premium Motor Oil SAE 5W-30, API SN, ILSAC GF-5 
136	23.8	5,641	14.90	2015	ACCEL Motor Oil SAE 5W-30
137	23.8	5,764	14.60	2017	Ford Motorcraft SAE 5W-20 Synthetic Blend Motor Oil
138	23.8	5,766	14.60	2017	Phillips 66 Shield Choice SAE 5W-30 Synthetic Blend Motor Oil
139	23.7	5,746	14.70	2016	Valvoline Premium Conventional SAE 5W-20 Motor Oil
140	23.4	6,021	14.20	2013	Pronto Supreme  API SN, ILSAC GF-5, SAE 5W-20 motor oil.
141	23.3	6,164	13.90	2017	Navi Guard Elite SAE 5W-30 Synthetic Blend
142	23.3	6,082	14.10	2015	SuperTech Conventional SAE 5W-30
143	23.3	5,618	15.30	2013	Peak API SN, ILSAC GF-5, SAE 5W-20
144	23.2	5,790	14.90	2014	Advance Auto Parts API SN, ILSAC GF-5, SAE 5W-20 motor oil.
145	23.2	5,911	14.60	2014	Advance Auto Parts High Mileage, API SN, ILSAC GF-5, SAE 10W-30 motor oil.
146	23.1	6,356	13.60	2016	Circle K SAE 5W-30 Premium Motor Oil
147	23.1	5,692	15.20	2014	Valvoline API SN, ILSAC GF-5, SAE 5W-20 motor oil. (White Bottle)
148	23.0	5,828	14.90	2017	Phillips 66 Trop Artic SAE 5W-20 Synthetic Blend Motor Oil
149	23.0	5,720	15.20	2013	Federated Auto Parts  API SN, ILSAC GF-5, SAE 5W-20 motor oil.
150	22.9	6,055	14.40	2015	Valvoline SAE 5W-20 Premium Conventional Motor Oil
151	22.9	5,745	15.20	2013	Motorcraft API SN, ILSAC GF-5, SAE 5W-20 motor oil. (Synthetic Blend)
152	22.9	5,984	14.60	2014	Chevron Supreme API SN, ILSAC GF-5, SAE 5W-20 motor oil.
153	22.9	5,825	15.00	2014	SurgeGuardAPI SM, ILSAC GF-4, SAE 5W-20 motor oil.
154	22.8	5,955	14.70	2015	SynGard Synthetic Blend SAE 5W-30
155	22.7	6,034	14.60	2013	Wolf's Head API SN, ILSAC GF-5, SAE 5W-20 motor oil.
156	22.7	5,877	15.00	2015	STP Pro Formula 5W-30
157	22.7	6,174	14.30	2014	MAG1 Motor Oil API SN, ILSAC GF-5, SAE 5W-30 motor oil.
158	22.5	5,846	15.20	2013	CERTIFIED Performance Engineered,  API SN, ILSAC GF-5, SAE 5W-20 motor oil.
159	22.3	6,008	14.90	2015	Phillips 66 Trop Artic SAE 5W-30 Synthetic Blend Motor Oil
160	22.3	6,220	14.40	2013	RacePRO Semi Synthetic, API SN, ILSAC GF-5, SAE 5W-20 motor oil.
161	22.3	5,987	15.00	2013	Parts Master API SN, ILSAC GF-5, SAE 5W-20 motor oil.
162	22.2	5,854	15.40	2014	Delfin Ultimate API SM, ILSAC GF-4, SAE 5W-20 motor oil.
163	22.2	5,858	15.40	2014	Havoline Motor Oil with Deposit Shield SAE 5W-30, API SN, ILSAC GF-5
164	22.1	5,739	15.75	2013	76 Super Synthetic Blend, API SN, ILSAC GF-5, SAE 5W-20 motor oil.
165	22.1	5,960	15.20	2014	Brad Penn Synthetic Blend API SN, ILSAC GF-5, SAE 5W-20 motor oil.
166	22.1	6,292	14.40	2015	Mobil Special SAE 5W-30 Quality Motor Oil
167	21.9	6,373	14.30	2014	Mototech Motor Oil API SN, ILSAC GF-5, SAE 5W-30 motor oil.
168	21.9	6,004	15.20	2015	Ford Motorcraft SAE 5W-30 Synthetic Blend
169	21.6	6,165	15.00	2016	Phillips 66 Trop Artic SAE 5W-30 Synthetic Blend Motor Oil
170	21.5	6,124	15.20	2014	SuperTECH High Mileage, API SN, ILSAC GF-5, SAE 5W-30 motor oil.
171	21.4	6,199	15.10	2014	Kendall with Liquid Titanium API SN, ILSAC GF-5, SAE 5W-20 motor oil.
172	21.3	6,144	15.30	2015	Agip SUPER XL SAE 5W-30, API SN, ILSAC GF-5
173	21.2	6,334	14.90	2014	7-Eleven Motor Oil API SN, ILSAC GF-5, SAE 5W-30 motor oil
174	20.8	5,988	16.05	2014	PEAK High Mileage Motor Oil API SN, ILSAC GF-5, SAE 5W-30 motor oil.
175	20.7	6,262	15.40	2014	O'Reilly High Mileage API SN, ILSAC GF-5, SAE 5W-30 motor oil.
176	20.6	2,474	39.20	2017	MORGAS SAE 5W-20 Synthetic Blend (failed tests)
177	20.6	5,288	18.35	2013	Valvoline  NextGen API SN, ILSAC GF-5, SAE 5W-20 motor oil.
178	20.4	6,326	15.50	2014	MileMaster API SN, ILSAC GF-5, SAE 5W-20 motor oil.
179	20.3	6,227	15.80	2016	Service Pro Premium Lubricants SAE 5W-20 Synthetic Blend Motor Oil
180	20.2	6,335	15.65	2014	Evolve API SN/ILSAC GF-5, SAE 5W-30 motor oil.
181	19.9	6,355	15.80	2013	CITGO SUPERGARD Synthetic Blend,  API SN, ILSAC GF-5, SAE 5W-20 motor oil.
182	19.1	6,833	15.30	2017	SuperS Custom Plus SAE 5W-20 Synthetic Blend (failed tests)
183	11.7	3,197	53.40	2016	Super XXX Platinum 5W30 Premium Motor Oil (failed tests)
_________________________
1985 Toyota Corolla LE, 4A-LC engine, ~ 269,000 M
Toyota (TGMO) 0W-20 SN synthetic
Mobil 1 EP M1-103 filter, 90430-12031 drain gasket

Top
#4452951 - 07/08/17 12:42 AM Re: List of oils by base-oil-quality index: a ranking [Re: Gokhan]
901Memphis Offline


Registered: 08/14/10
Posts: 12871
Loc: Northern Kentucky
We all know Pennzoil Ultra is pretty amazing already
_________________________
2012 Chevy Cruze LT 1.4T - 50k
2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980

Top
#4452959 - 07/08/17 12:54 AM Re: List of oils by base-oil-quality index: a ranking [Re: Gokhan]
mbacfp Offline


Registered: 09/02/15
Posts: 778
Loc: California
Great info. Thanks for sharing your info and knowledge.
_________________________
2014 F-550 PSD..........M1 Delvac ESP 5w-40 + OEM
2018 Dodge Hellcat Charger
2012 Toyota Sienna LTD 3.5L V6
2003 Dodge Durango R/T 4x4 5.9L V8

Top
#4452967 - 07/08/17 01:13 AM Re: List of oils by base-oil-quality index: a ranking [Re: Gokhan]
chemman Offline


Registered: 02/19/07
Posts: 63
Loc: Maryland
I am going to defer to Molakule for a more detailed explanation, but I do not see how inverse cP divided by % NOACK (the units of the equation) can be an indicator of base oil quality.

Perhaps you are on to something here.

Based upon my knowledge, an excellent base oil with a horrible additive package can result in a less than spectacular final product, and a poor base oil with an excellent additive package can result in a fairly good final product. This demonstrates how important the additive package in its totality is and how the chemistries involved (between the base oil and the different components themselves of the additive package) effects the various measured physical properties of the final product.

I've always believed that there is more than just a little bit of "black magic" and alchemy involved in the formulation of a quality motor oil, and the more I learn about lubricants, the more this belief is strengthened. Just as an FYI, I do have a Ph.D. in Chemistry and worked with the leftovers from various coal-liquefaction streams in graduate school.


Edited by chemman (07/08/17 01:17 AM)
Edit Reason: clarification
_________________________
92 Olds 88 Hav 5w30 PL/L24011
99 Buick Century Hav 5w30 PL/L24011
99 Silverado 5.3L Hav 5w30 PL/L25288
04 TrailBlazer 4.2L Hav 5w30 PL/L25288

Top
#4452984 - 07/08/17 02:20 AM Re: List of oils by base-oil-quality index: a ranking [Re: Gokhan]
Char Baby Offline


Registered: 05/25/05
Posts: 9751
Loc: ROCHESTER, NY
Thanks!
_________________________
"Retired"
'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'06 Mazda 3i 2.0L
'15 Nissan Altima 2.5 SV

Top
#4452985 - 07/08/17 02:20 AM Re: List of oils by base-oil-quality index: a ranking [Re: Gokhan]
CT8 Offline


Registered: 10/09/14
Posts: 10553
Loc: Idaho
I pour in the conventional oil with my left hand and the syn oil with my right hand 50 years of owning vehicles I only once had an engine failure and that was running Amsoil! Looking back I think I poured the Amsoil into the engine with my left hand.
_________________________
Artificial intelligence is no match for natural stupidity, we shall prevail

Top
#4452986 - 07/08/17 02:21 AM Re: List of oils by base-oil-quality index: a ranking [Re: Gokhan]
Shannow Offline


Registered: 12/12/02
Posts: 38990
Loc: 'Stralia
Do you divide or multiply by colour ???

Top
#4452995 - 07/08/17 03:02 AM Re: List of oils by base-oil-quality index: a ranking [Re: Shannow]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2322
Loc: Balearic Islands , Spain
Originally Posted By: Shannow
Do you divide or multiply by colour ???

LOL
_________________________
1975 Ford Capri II Ghia 3000 V6
1988 Ford Escort 1.6 Xr3i Convertible
Finnish expat living in Spain
My clothes smell like 15W-40 HDEO and 20W-50.

Top
#4452998 - 07/08/17 03:32 AM Re: List of oils by base-oil-quality index: a ranking [Re: Gokhan]
4WD Offline


Registered: 09/21/10
Posts: 6019
Loc: Texas/International
Think I have used at least half of the oils on that list. But this does not convince me that PUP (noisy for me) will make my 5.3L last longer than on the Delvac 1300 (Dino) in the sump now.
Might be good info for my ecoboost to keep CBU at bay. Surprised where Castrol is - been getting good tests here.
_________________________
2017 Tahoe 5.3L 4WD
2014 Fusion Hybrid
2013 Cruze RS 1.4T
2010 Canyon 5.3L 4WD

Top
#4453002 - 07/08/17 03:52 AM Re: List of oils by base-oil-quality index: a ranking [Re: chemman]
Gokhan Offline


Registered: 12/29/10
Posts: 2955
Loc: Los Angeles, California
Originally Posted By: chemman
I am going to defer to Molakule for a more detailed explanation, but I do not see how inverse cP divided by % NOACK (the units of the equation) can be an indicator of base oil quality.

This is a very good question! I didn't put the answer to it in the original post because I wanted to keep it brief.

My base-oil quality index (BOQI) was inspired by the following presentation:

Global perspective on lubricant specifications and how it affects base-oil quality (link)
John Rosenbaum, Chevron Global Base Oils


If you look at the two key figures of the presentation, the curves for the NOACK vs. CCS viscosity of a given base oil are approximately in the form:

(NOACK) x (CCS viscosity) = constant

In other words, they are inversely related to each other for a given base oil.

Moreover, the "constant" here is inversely proportional to the base-oil quality given by the API Group numbers (I, II, III, IV, GTL, etc.). Smaller the constant is, higher the API Group or higher the quality of the base oil is. Therefore, the inverse of the constant directly gives the base-oil quality. Therefore, I define the base-oil-quality index (BOQI) as follows:

BOQI = 2,000,000/(NOACK x CCS viscosity)

Here 2,000,000 cP was chosen to make the BOQI approximately between 10 and 100.

As I mentioned in the original post, it's crucial to compare the BOQI using the CCS viscosity at the same temperature for all oils, 5W-xx oils being reported at -30 °C for example. This makes it hard to compare a 5W-xx oil to, say, a 0W-30 oil because chances are very high that you won't find the CCS viscosity for them reported at the same temperature.




One caveat that I didn't mention in my original post: Viscosity-index improvers (VIIs) in the finished oil may somewhat alter the CCS-viscosity numbers for a base oil but for comparison purposes this doesn't seem to be an issue.
_________________________
1985 Toyota Corolla LE, 4A-LC engine, ~ 269,000 M
Toyota (TGMO) 0W-20 SN synthetic
Mobil 1 EP M1-103 filter, 90430-12031 drain gasket

Top
#4453016 - 07/08/17 04:35 AM Re: List of oils by base-oil-quality index: a ranking [Re: Gokhan]
CourierDriver Offline


Registered: 12/27/09
Posts: 4826
Loc: Tn.
I always pick the red oil bottles at wallys,,,goes with my outfit..............lmao
_________________________
Appreciate America, no one is migrating to Mexico, the Middle East,Russia,and so on,,they are all coming here...remember ??

Top
#4453086 - 07/08/17 07:24 AM Re: List of oils by base-oil-quality index: a ranking [Re: Gokhan]
Wurlitzer Offline


Registered: 04/12/17
Posts: 60
Loc: Appalachia
I, for one, like to buy whatever oil is the most expensive. Can't have have people thinking I'm poor or something. I'm from Florida and drive a 2019 GMC Yukon XXL with 6WD; I need it for me and my wife who live in our home in the mountains 1 week out of the year.

Top
#4453108 - 07/08/17 07:51 AM Re: List of oils by base-oil-quality index: a ranking [Re: Wurlitzer]
cb_13 Offline


Registered: 07/24/11
Posts: 897
Loc: Missouri
Originally Posted By: Wurlitzer
I, for one, like to buy whatever oil is the most expensive. Can't have have people thinking I'm poor or something. I'm from Florida and drive a 2019 GMC Yukon XXL with 6WD; I need it for me and my wife who live in our home in the mountains 1 week out of the year.


Another satisfied Amsoil customer!!

Top
#4453174 - 07/08/17 09:16 AM Re: List of oils by base-oil-quality index: a ranking [Re: cb_13]
Kira Offline


Registered: 08/19/10
Posts: 4893
Loc: Champlain/Hudson Valley
That's a ZING, right?

Top
#4453176 - 07/08/17 09:20 AM Re: List of oils by base-oil-quality index: a ranking [Re: Gokhan]
69GTX Offline


Registered: 09/23/15
Posts: 3742
Loc: Connecticut
Thanks for that listing. It certainly has some merit. Like other rankings we've seen that have invoked much discussion, there's nothing wrong with using oils near the top of the lists....rather those those in the bottom half.
_________________________
----------------

2002 Lincoln Cont 4.6L DOHC/ 81K mi /PPlat 5w30/FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs

Top
Page 1 of 8 1 2 3 4 5 6 7 8 >