Engine break in oil?

dartfreak75 said

Thanks I didn't not know that about the paraffin I'm sure its changed since the 60s lol Tbh I have never heard of that. But with a brand new motor sludge is something I'd like to avoid for sure!

Click to expand...

That sludge was a by product of leaded gasoline and fuel dilution. Very outfits ude osrafin based oils anymore but anything out of the old Bradford, PA refinery still is plus Cenpeco and maybe a couple others. Parafin based oils are a cleaner base stock than any other dino oil.

End of my BITOG/540Rat-ish reply.