'67 BIG BLOCK OIL RECOMMENDATION

[Rob A.]

I'm getting ready to start my rebuilt big block. What is the current recommended weight oil. (I am in southern California, so there won't be any temp below around 40 degrees).

[Clem Z.]

Re: '67 BIG BLOCK OIL RECOMMENDATION

i would do the cam breakin with #30 HD oil and a can of GM EOS part # 1052367 and then change oil and filter to 10W-30

[Doug C.]

Re: '67 BIG BLOCK OIL RECOMMENDATION

Rob, Just make sure you DO NOT use a synthetic or synthetic blend oil until your engine is past the break-in period.

[Dick W.]

Re: '67 BIG BLOCK OIL RECOMMENDATION

From my experience, don't use synthetic in any Chevy engine with the two piece rear main oil seal. Synthetic will invent new places to leak, and everyone knows the only vintage small and big blocks that do not leak oil are the ones that do not have oil in them.