Quote:
Originally Posted by kenchan
I use the "inferior" m1 5w30 with no oil cooler for the last 5yrs driving street.
No issue for me. I don't intend to change oils either.
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based on UOA's m1 5w30 is pretty much an inferior oil nowadays. its on the thinner side of a 5w-30, and tends to shear down to a 20 weight relatively quickly. along with the shearing, the longevity of the oil is shortened. look at any of hte m1 UOA's and you'll see the TBN figure to be on the low side prior to the 5K mark.
although, as long as you change at the correct interval, and dont mind an oil that shears to a thinner weight, yes, most oil will be the same. if you want a better m1 5w30, go for the "extended performance" bottle, which has much better qualities