Ok, here goes another oil related discussion… I have heard several opinions on using diesel oil in a gasoline engine. Some say this is a great idea for the engine internals while others say it isn’t the correct application. All agree that the higher levels of anti-wear additives might shorten the…

While not the best for gas engines, Diesel intended lubricating oil is just fine. older diesel fuels used to have a lot more sulfur and the oils for the engines had a high TBN or ability to neutralize the acids formed. THey also tended to have a more robust detergent package to handle the soot . New…

I understand that the Rotella T6 is a “mixed fleet” oil. It is a full synthetic and can be bought at Wal-Mart for $20-22 usually. I found a .PDF specs sheet that I would post the link to but it seems some type of filter on the forum doesn’t link links and my messages will not post. It meets the g…

cwatkin,thats good to know,most spark ignition oils now don’t even carry a c rating-Kevin

Yeah, this oil carries a ton of the C-ratings and I think the gas engine ratings are somewhat of an afterthought. Either way, it looks like you can use it if the viscosity ratings match the specs called for by your engine. I don’t think I have anything to worry about in simple air-cooled engines a…

@cwatkin - current (2010 and newer) is SN. What year is your car? More info here: http://www.api.org/certification-programs/engine-oil-diesel-exhaust-fluid/~/media/Files/Certification/Engine-Oil-Diesel/Publications/MOM_GUIDE_ENGLISH_2013.pdf I’d not pay anything additional to use a diesel spec o…

I know that some small engine owners have used diesel motor oils in their small motors with good claimed success. At least the motrs aren’t self distructing. Personally, I still wonder why we keep trying to reinvent the wheel. When manuals for gas motrs start recommend doing it, I’ll use them. Unt…

The secret to a small air cooled motor in a lawn mower, tiller, or snow thrower lasting isn’t the oil, it is changing the oil and using the recommended weight. Diesel oil is fine, but so is basic 30W oil in most cases (snow throwers often take a 10W-30). Homeowners should change the oil once a yea…

All the vehicles in question are year 2000 or older. This says something about the maintenance they have been getting as all run great and don’t use a drop of oil between changes. I have actually heard that some of the newer oils are not as good for older engines because of the reduction in zinc c…

15-40 Universal Fleet Oil has been around for a LONG time…Today, you can buy “Diesel Oil” in viscosity grades suitable for todays gas engines. If you look closely at the label, most of these Diesel rated products also meet the API SH, SN, SL specification used for gasoline engines. So why do the oi…

Use of diesel oil in gas engines - Good idea or not?

General Discussion

Docnick June 24, 2013, 11:10pm 3

EXXON has what they called a “mixed fleet” oil, which is OK for both diesels and gasoline engines.'s intended for businesses that have both types of vehicles and reduces their inventory they have to stock. Your industrial lubricants distributor would have it; don’t count on Walmart to stock it.

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Use of diesel oil in gas engines - Good idea or not?

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