My car is in its rinse AutoRX cycle using dino Havoline 5-w30 (1st time use). I used mainly M1 0w-30 and M1 0w-40 from 60000mi to the present 93000mi. Previous history is not known, but oil consumption is negligible.
My concerns are:
a. The mileage is so close to the 100000mi marker
b. Unknown...