Yes 15w40 in my pony motors HOWEVER only if you are sure the engine is clean inside DEO will loosen years of sludge which then circulates causing rapid wear , change run a couple of times change again !!!
Do guys run non detergent 30 WT oils in there pony motors as well?
I guess you could , back in the day the theory was if it had a filter you used a detergent oil so dirt was carried to the filter if it didn't
then the non detergent oil allowed the dirt to settle out and not keep going round everything , these days most stuff does just fine with detergent oils regardless... however as above you can set a lot a crap in motion if you put a detergent oil in a sludged up motor ...
Been using 30w non detergent for years, was the original spec I think & is working fine. I change it frequently because it is so cheap for the insurance.
I use Delo in absolutely everything I own and have since the 50's. I have never lost an engine due to lubrication issues regardless of what jiffy lube says will happen.
There is an exception, when I lived in IA Delo was hard to find so I switched to Delvac for a few vehicles, then back to Delo.
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