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#1483035 - 05/31/09 10:24 PM Pros and Cons of Diesel Oil in Gasoline Engine?
lancerplayer Offline


Registered: 09/09/07
Posts: 267
Loc: Cleveland, OH
What are the pros and cons of using diesel oil in a gasoline engine? I know diesel oils has more additives and detergents and such, but is that the only reason?
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#1483045 - 05/31/09 10:32 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine? [Re: lancerplayer]
pitzel Offline


Registered: 09/13/04
Posts: 1471
Loc: Saskatchewan, Canada
Pros: more ZDDP.
Higher initial TBN
Lower cost due to less marketing.

Cons: higher ZDDP (not good if you are a frequent oil changer and have emmissions gear, but probably not an issue if you do extended drains).
Typically only available in heavier viscosities.
May not be readily available.
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#1483202 - 06/01/09 05:13 AM Re: Pros and Cons of Diesel Oil in Gasoline Engine? [Re: pitzel]
Char Baby Offline


Registered: 05/25/05
Posts: 9215
Loc: ROCHESTER, NY
May reduce MPG but, not always!
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"Retired"
'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'06 Mazda 3i 2.0L
'15 Nissan Altima 2.5 SV

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#1483465 - 06/01/09 11:07 AM Re: Pros and Cons of Diesel Oil in Gasoline Engine? [Re: Char Baby]
addyguy Offline


Registered: 09/08/05
Posts: 14161
Loc: Canada
Pro: Thicker, most are 40-weight, even the 30 weights are heavy within the grade - may help consumption.
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2010 Kia Soul 2U - 2.0L I-4, auto; 114k miles.
5W/10W-30 frankenblend; OEM Kia filter.

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#1483530 - 06/01/09 12:07 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine? [Re: addyguy]
pickled Offline


Registered: 02/14/08
Posts: 2098
Loc: The Rocky Mountains
Pros contamination tolerance Cons well sometimes you can only by them by the gallon.
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#1483778 - 06/01/09 05:39 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine? [Re: pickled]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
There is a 10-30 available, but that is the thinnest I've heard of.
Normally 15-40 or 5-40.
This is a bit thick for modern cars. Not a big deal in Summer, but cold starts in winter will suffer -flow and drag.

I think if they had a5-20 and 5-30 HD oil, everyone here would consider using it, otherwise.

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#1483805 - 06/01/09 06:11 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine? [Re: mechtech2]
wannafbody Offline


Registered: 01/02/08
Posts: 895
Loc: PA
Cons: spark plugs start to glow
engine sounds like rattling cans
blows black smoke







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2000 TA WS6

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#1483837 - 06/01/09 06:42 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine? [Re: wannafbody]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 11367
Loc: N.H, U.S.A.
How about the magnesium additive; that is usually not in PCMO, mosy likely for a good reason. Will that Mg (?) compound cause some issues?
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2014 Nissan Rogue S CVT, OC#8 36109mi-MAGNATEC 5W30 + FRAM TG7317 Filter; 2017 Subaru Crosstrek CVT 4762mi-SOA 0w20 + SOA Filter

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#1483841 - 06/01/09 06:50 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine [Re: ARCOgraphite]
Ben99GT Offline


Registered: 02/25/05
Posts: 4335
Loc: MS
According to Horsepower TV, Rotella will cause engine sludge in a gasoline engine.

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2001 F150 Supercrew 4.6 - 314K miles- PP 5W-20/MC FL-820S
2011 Shelby GT500 SVTPP - 705 RWHP - PP Euro 0W-40/Wix 51372XP


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#1483845 - 06/01/09 06:55 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine [Re: ARCOgraphite]
saaber1 Offline


Registered: 11/28/07
Posts: 1877
Loc: Pacnw
 Originally Posted By: ARCOgraphite
How about the magnesium additive; that is usually not in PCMO, mosy likely for a good reason. Will that Mg (?) compound cause some issues?


Castrol syntec 5W40 is loaded with Magnesium. As I remember I saw on the order of 700-900ppm on UOAs.
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"when 5W30 is cold, ...the oil is 35 weight (5+30),...20 w 50 starts at 70 and warms up to 50"
- Kyle, auto mechanic & VP Speedline Motorsports, INTL

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#1483848 - 06/01/09 06:57 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine [Re: Ben99GT]
saaber1 Offline


Registered: 11/28/07
Posts: 1877
Loc: Pacnw
 Originally Posted By: Ben99GT
According to Horsepower TV, Rotella will cause engine sludge in a gasoline engine.


What is horsepower tv? I assume an informercial? What brand are they trying to sell if it is an infomercial?
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"when 5W30 is cold, ...the oil is 35 weight (5+30),...20 w 50 starts at 70 and warms up to 50"
- Kyle, auto mechanic & VP Speedline Motorsports, INTL

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#1483868 - 06/01/09 07:18 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine [Re: saaber1]
Doug Hillary Offline


Registered: 05/30/03
Posts: 5109
Loc: Airlie Beach Australia
Hi,
saaber1 - "Magnesium" is typically used as a detergent. It is being replaced in some HDEOs by the more expensive "Calcium" products

HDEOs that are not endorsed "mixed fleet" and carry dual petrol/diesel API/ACEA Quality ratings should NOT be used in petrol engines. This especially applies to those with a very high TBN due to their likely SA levels
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Doug

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#1483900 - 06/01/09 07:59 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine [Re: Doug Hillary]
FiremarshalRob Offline


Registered: 03/25/08
Posts: 553
Loc: Baton Rouge, LA
What about SAE 30 in an older model vehicle that calls for 5w-30?
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I have a tendency to be rather OCD regarding my vehicle maintenance.
2008 Nissan Altima 2.5S
2006 Silverado 5.3L
1996 1.3L Geo Metro

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#1483935 - 06/01/09 08:23 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine [Re: Doug Hillary]
IcebergS2000 Offline


Registered: 10/19/07
Posts: 74
Loc: Southeast Texas
 Originally Posted By: Doug Hillary

HDEOs that are not endorsed "mixed fleet" and carry dual petrol/diesel API/ACEA Quality ratings should NOT be used in petrol engines. This especially applies to those with a very high TBN due to their likely SA levels


Just want to clarify your statement... Are you saying that, if they do not say "mixed fleet", even though they may be SM rated, they should still not be used in a gasoline engine?
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#1483950 - 06/01/09 08:34 PM Re: Pros and Cons of Diesel Oil in Gasoline Engine [Re: Ben99GT]
StevieC Offline


Registered: 08/21/08
Posts: 16345
Loc: Ontario, Canada
 Originally Posted By: Ben99GT
According to Horsepower TV, Rotella will cause engine sludge in a gasoline engine.

I heard that last weekend... I laughed too!
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'15 Dodge Journey - 80,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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