I will keep running my M1. I get 10k mile plus oil changes.
When I put M1 in my then new 1992 Olds Delta 88 after break in. Same wieght 5w-30. The wife and I laughed at the car when I started it up and it had to readjust it computer. Cant prove it was from less friction. But some thing had to change when the oil did.
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09 HCHII, w/Navi
07 Mazda3 S Touring, 5MT
Mild Hypermiler or Mad Man?