20 or 30 weight non detergent (if you can find it) in an old used engine is just fine. I use 15w40 synthetic in mine. Everyone has an opinion on this and it has been discussed to death so I recommend you do a search on engine oil.


1953 Chevy 5-window 3100
In the Stovebolt Gallery
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Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain