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tubman · 07-17-2019, 11:33 PM

I ran Mobil-1 20W-50 in the original engine in my '51 before I put the new engine in. I didn't see any increased leakage while I was using it.

07-17-2019, 11:33 PM	#14
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,312	Re: Mixing synthetic and regular oil I ran Mobil-1 20W-50 in the original engine in my '51 before I put the new engine in. I didn't see any increased leakage while I was using it. Last edited by tubman; 07-18-2019 at 09:09 AM.