Mobil 1 5W20

Messages
688
Location
Morgantown, WV
Found an article about synthetic oils from 1978. Guess what weight the Mobil 1 was? The stuff that had a 25k oil change interval? It was 5W20. Yep. I wish I could get a can of that stuff for analysis now. Cheers, 3MP
 

Patman

Staff member
Messages
21,989
Location
Oakville, Ontario
I think the original formula of Mobil 1 was also all PAO, with no esters, and caused a lot of engines to develop nasty leaks, which is why a lot of people to this day are still afraid to put in synthetic oil in a high mileage engine. They just think it's going to cause leaks.
 
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