OT - Diesel oil in gas engine

phil_n · Mar 19, 2015

Any problem running 15-40 diesel oil in an older gas engine in a car?

old · Mar 19, 2015

No problem at all. Oil made for a diesel is a better oil then made for a gas engine any how

rrlund · Mar 19, 2015

I run it in all my gas tractors. Don't know what the difference would be.

Janicholson · Mar 19, 2015

Pre Catalytic cars would be fine, it might not be a permanent solution for a Cat equipped car. Stopping the reaction starts the plugging up process. Jim

ObsoElitist · Mar 19, 2015

(quoted from post at 14:57:03 03/19/15) I run it in all my gas tractors. Don't know what the difference would be.

Zinc (ZDDP )was killing catalytic converters in gasoline vehicles, so they reduced it drastically in oils rated SM and up. The change caused much damage to vintage auto racer's performance camshafts. I worked in the vintage Lotus racing business when they changed over, and we sold a lot of parts. It does the same to "normal" engines slower. Diesels dont have cats, so they didnt change their formulation much. I run diesel rated Delo or Rotella in all my pre-cat gas engines, and i have a lot of them

CenTex Farmall · Mar 19, 2015

All the 15-40 I've seen, if you read the fine print, is designed for mixed fleet use, i.e. gas and diesel. It has detergents for soot control that gas doesn't need but it won't hurt anything. Usually has a higher level of ZDDP type additives that older engines with sliding parts (flat tappet cams and shaft/ball socket rockers) love. The newer emissions equipment on diesels required limiting the zinc levels somewhat (CJ-4 spec) but they are using newer technology additives to do what the ZDDP did.

You can find all the oil info you will ever need at Bobistheoilguy.com. Goofy name but serious information.

Traditional Farmer · Mar 19, 2015

I've been running 15W-40 diesel grade oil in every engine I've owned gasoline,propane and diesel for the last 20 years with no problem I know of.My wife's 98 Toyota Corolla has had nothing else since its first oil change and at 230,000+ miles its still going strong.

phil_n · Mar 19, 2015

Thanks everyone.

DeltaRed · Mar 19, 2015

No problems or issues.I've been running the same
15/40 fleet diesel in ALL my gas/diesel
cars,trucks,tractors,combines....forever.Never had
an 'oil related'problem .One oil,no mixups.Easy
inventory...

bill mart · Mar 19, 2015

how does that viscosity work in areas of the country that get down to 0 degrees and lower. (like western NY). Bill

Don-Wi · Mar 20, 2015

I know my 95 f250 w 5.8 doesn't like it in the winter. Knocks and rattles really bad for a while before it can pick it up. I just change run 10w-30, and after it starts burning off some oil I'll put in some 15 40. Helps slow down consumption and by then it's usually getting warmer out again.

Donovan from Wisconsin

Ferd · Mar 20, 2015

I used Delo 15-40 in my 230 Farmall for the first oil change after I bought it and had a lot of wet stacking. Next oil change I used regular 10-40 and the wet stacking stopped. Have no idea why - just what happened.

2underage · Mar 20, 2015

My cars go between oil changes without needing any oil. How does oil affect the cat converter?

pete 23 · Mar 20, 2015

If an engine did not burn up some of the oil in the combustion chamber it would sieze very shortly.

OT - Diesel oil in gas engine

phil_n

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old

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rrlund

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Janicholson

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ObsoElitist

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CenTex Farmall

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Traditional Farmer

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phil_n

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DeltaRed

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bill mart

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Don-Wi

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Ferd

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2underage

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pete 23

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