Delo (and the other major national brand CI-4 oils) is available in a variety or SAE grades, including 10W-30, but most autoparts stores typically carry 15W-40 and straight 30 or 40.

Google on "delo" and you will find the Chevron-Texaco web site that has all the Delo spec sheets.

Duke

now you guys have got me thinking about oil... and since an aircraft engine runs at 100% power then is turned down to 75% power and since they have such high standards it seems like aircraft oil would be the best...

An automobile engine will quickly fail if run on aircraft engine oil. Aero engine run much lower RPM's, much larger bearing surfaces, much lower film strength requirements, and aero oils DO NOT have the anitwear and detergent additives essential for automotive engine service. A major (unnamed) oil company with lots of 'synthetic auto oil business, offered a synthetic aero engine oil. They pulled it from the market after there were engine failures due to valve sticking. They bought quite a few engines I heard. (the qualification testing for aero service is running a test engine wide open 100% rated power for 100 hours on a test stand, then teardown and inspection to see what wore abnormally. )

Delo is a premium quality oil for sure. 15W40 is fine for all but extreme cold climates in lower 48--anything above say 10F is OK. Down to about -5 F is workable, but let it warm up before belting it.

aircraft engines run at high rpms....

and at 70% power all the time... where as a car is running at 30% power..


i just red the spec for the aircraft oil and it is loaded with detergents and many additives.... dispersant for ash,, and anti crosives... i am thinking about trying it in a vehicle...

here is what i just read from another web page about oil change intervals..

The fact of the matter is that even car manufacturers are recommending much longer oil change intervals than they used to. For example, my 1996 Honda Civic has a recommended oil change interval of 7500 miles, the 2002 Cadillac Seville has a 12,500 mile interval, the 2001 LS-6 Corvette has a 15,000 mile change interval, Porsche recommends a 15,000 mile interval and all new BMW's use a computer to calculate when the oil should be changed and the interval usually comes out to 10-15,000 miles.

I have been using shell rotella synth. in my motorcycles and cars w/ no problems. One of them is a wrx turbo.... with no ill effects.

I'm no chemist, but I've poured a few quarts of oil into a Cessna in the past. I can tell you that aero oil looks different, smells different and feels different than automotive oil. I think it must have a mineral oil content or something.

Something that is SO different is certainly different for a reason. I would no more pour a quart of aero oil in a car or truck than I would pour a quart of automotive oil in an engine for which my life depended.

Have a great day,