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#4707055 - 03/25/18 11:40 PM Castrol Synthetics?
bora350 Offline


Registered: 03/23/18
Posts: 4
Loc: Washington
Upon looking at the PDS for Castrol synthetics, their oils seem to be worse or equal to conventional motor oils. Very high MRV numbers, and relatively low VI. Compare it to PUP or QSUD, VI is in the 170s and very low MRV ~4000 (cP). Of course you have to realize that -35c is reaching the pour point of most oils, so the average user will never experience these extremes, but overall I'm not impressed.

Castrol EDGE High Mileage 5w-30:
Density @ 15C, Relative ASTM D4052 g/ml 0.856
Appearance Visual - Clear & Bright
Viscosity, Kinematic 100C ASTM D445 mm/s 11.3
Viscosity, CCS -30C ASTM D5293 mPa.s (cP) 6200
Pour Point ASTM D97 C -39
Viscosity, MRV / Yield Stress -35C (5W) ASTM D4684 mPa.s (cP) 35000
Viscosity, Kinematic 40C ASTM D445 mm/s 67.2
Viscosity Index ASTM D2270 None 159
Noack Volatility ASTM D5800 % Loss 10.0
Flash Point, PMCC ASTM D93 C 220

Mobile Super 5w-30:
API Service Classification SN
Gravity, API 32.9
Specific Gravity 0.8607
Pour Point, C (F) -36(-33)
Flash Point, C (F), ASTM D 92 221(430)
Viscosity
cSt at 40C 63.95
cSt at 100C 10.7
CCS, cP 6,080 @ -30C
MRV, cP 26,800 @ -35C
Viscosity Index 158




Edited by bora350 (03/25/18 11:42 PM)

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#4707058 - 03/25/18 11:47 PM Re: Castrol Synthetics? [Re: bora350]
1JZ_E46 Offline


Registered: 04/04/16
Posts: 1243
Loc: Oregon
Castrol synthetic might as well be conventional except for their 0W-30 and 0W-40, which have a significant slug (25-50%) of PAO. The rest of their stuff is sub-par from everything I can gather. I would pick M1 or Pennzoil any day over non-0W Castrol.
_________________________
2007 BMW X5 4.8i, 105K: Castrol EDGE 0W-40, Mann
2012 Mini Cooper, 45K: Castrol EDGE 0W-30, Mann

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#4707059 - 03/25/18 11:48 PM Re: Castrol Synthetics? [Re: bora350]
BigJakeChevy Offline


Registered: 07/26/15
Posts: 126
Loc: Alberta
Completely agree! In my pickup their oils gave me horrible start up noise and also when hot my engine sounded like a sewing machine! Won't touch them to this day!
_________________________
2007 Silverado Classic 5.3L PPPP 10w30 455,000kms

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#4707062 - 03/26/18 12:03 AM Re: Castrol Synthetics? [Re: bora350]
Stevie Offline


Registered: 11/08/04
Posts: 219
Loc: Port Aransas, TX
Running Castrol MAGNATEC 5W/30 in my wife's 2014 Elantra. Had a great UOA and engine very quiet at startup.
I think it is the intelligent molecules in MAGNATEC.
According to Castrol:
THE INTELLEGENT MOLECULES:
Cling to critical engine parts when the oil drains down
Add a layer of protection during warm-up and beyond
Dramatically reduce engine wear
Leave critical engine parts 4X smoother

Hey works for me grin
I run Mobil 1 0w40 in my SLK, but am going to try Castrol 0w40 next oil change. I hear they use Titanium.

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#4707063 - 03/26/18 12:07 AM Re: Castrol Synthetics? [Re: bora350]
PimTac Offline


Registered: 03/04/17
Posts: 4632
Loc: Soviet State of Washington
The fishing is better at Lake Stevens.
_________________________
2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter


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#4707075 - 03/26/18 12:58 AM Re: Castrol Synthetics? [Re: bora350]
Dylan1303 Offline


Registered: 10/14/15
Posts: 210
Loc: Washington
Ive never been a fan of castrol. Arnt they still cleaning up bps oil spill?
_________________________
12 cruze 1.4t 6spd pp 5w30 tuned on 22lbs
13 equinox 2.4 awd pp 5w30

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#4707076 - 03/26/18 01:03 AM Re: Castrol Synthetics? [Re: Stevie]
4WD Offline


Registered: 09/21/10
Posts: 6547
Loc: Texas
After just 4K I noticed the clinging molecules worked so good we had a black corn dog for a dipstick
And under the cap? Heck, looked like the Louisiana shorelines in 2010

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#4707078 - 03/26/18 01:08 AM Re: Castrol Synthetics? [Re: bora350]
Lethal1ty17 Offline


Registered: 07/01/10
Posts: 814
Loc: TX
I've done multiple UOA's with Castrol Edge 5w20 EP and M1 of various flavors and they're so close to each other there is really no difference at all. Also, I do notice Castrol gets darker faster for whatever reason, I just attribute that to its cleaning ability.

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#4707098 - 03/26/18 03:02 AM Re: Castrol Synthetics? [Re: bora350]
double vanos Offline


Registered: 08/05/04
Posts: 1914
Loc: 5600 feet elevation, Arizona
KJ Smith may beg to differ, hes had lots of terrific UOAs using Magnatec in Ecoboost trucks. And I quit getting excited over VI numbers. In fact, to me at least, the oils with lower VI#s also have lower NOACK #s. All oils nowadays are pretty good, conventional included. The line between conventional, syn blends and full syn are getting pretty slim....
_________________________
Sabine Schmitz is the Queen of the 'Ring; Svetlana Kapanina is the Queen of the SKIES...

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#4707105 - 03/26/18 04:22 AM Re: Castrol Synthetics? [Re: Dylan1303]
skyactiv Online   content


Registered: 03/02/13
Posts: 4506
Loc: The Midwest
Originally Posted By: Dylan1303
Ive never been a fan of castrol. Arnt they still cleaning up bps oil spill?


Who cares.
_________________________
Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual

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#4707115 - 03/26/18 05:13 AM Re: Castrol Synthetics? [Re: skyactiv]
BlueOvalFitter Offline


Registered: 02/28/03
Posts: 6003
Loc: Cajun Country, La.
Originally Posted By: skyactiv
Originally Posted By: Dylan1303
Ive never been a fan of castrol. Arnt they still cleaning up bps oil spill?


Who cares.

I would really like to see you come down here to Bayou Lafourche and tell these shrimpers that! I have a cousin that lives down there and shrimping is his livelihood. He is 4th generation, but barely. When the BP oil spill happened it brought the family business to its knees!
Now, I think BP has done A LOT to mend the fence about the situation. No, it will never be the same, but it sure is better today then it was a few years ago.

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#4707116 - 03/26/18 05:19 AM Re: Castrol Synthetics? [Re: double vanos]
wemay Offline


Registered: 04/04/12
Posts: 8998
Loc: Southeast Florida
Originally Posted By: double vanos
KJ Smith may beg to differ, hes had lots of terrific UOAs using Magnatec in Ecoboost trucks. And I quit getting excited over VI numbers. In fact, to me at least, the oils with lower VI#s also have lower NOACK #s. All oils nowadays are pretty good, conventional included. The line between conventional, syn blends and full syn are getting pretty slim....


This ^
Especially now where d1G2 has brought everyone closer together.
_________________________
17 Sonata Sport 2.4L
NAPA Full Synthetic 5w20 | OEM

13 Santa Fe Sport 2.0T
Valvoline MaxLife 5w30 | M1-104

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#4707119 - 03/26/18 05:27 AM Re: Castrol Synthetics? [Re: bora350]
farrarfan1 Offline


Registered: 06/24/04
Posts: 1551
Loc: Indiana
If you don't like Castrol oil then don't use it. No big deal.
_________________________
If laughter is the best medicine, then why do sick people go to doctors instead of comedians?

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#4707121 - 03/26/18 05:30 AM Re: Castrol Synthetics? [Re: bora350]
rooflessVW Offline


Registered: 12/24/11
Posts: 4329
Loc: North Carolina
Castrol works well for everyone but the base stock snobs.
_________________________
"Zed's dead baby, Zed's dead."

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#4707124 - 03/26/18 05:34 AM Re: Castrol Synthetics? [Re: bora350]
mobilaltima Offline


Registered: 02/03/11
Posts: 1165
Loc: Golden Meadow, LA
Thanks BlueOval fitter! As a life long resident of Bayou Lafourche, we are still feeling the effects of the spill and remarks like those made by Skyactiv and such are upsetting. Anyhow, who is your cousin, the shrimper?
_________________________
2006 2500 Dodge 5.9 Cummins Mobil Delvac 15W40, Fleetguard Stratapore 90k miles
Early '99 F250 ECLB 7.3 Stroker, 223k miles

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