Thank you for the info. I feel I would be safe with straight 30 weight. I need to contact the previous owners and get more history. It runs and drives great so I feel the engine has had some work or been very well maintained. Thanks again, Doug
I am looking for advice on what oil I should use in my 1958 Chevy Apache pick up. Detergent or non detergent. It has a 235 six cylinder engine with a canister type oil filter. Thanks Doug,