Quote:
Originally Posted by flexinator
They changed the formula, the PDS numbers look great but it's no longer BMW long life one approved. It's not clear why it's no longer approved but from the used oil analysis on Bob is the oil guy my guess is it does not Retain grade and breaks down too soon under high shear. It's viscosity index and HTHS are excellent. It was the last mobil that was a long life approved and I would use it but without that certification I'm not going to take the risk. How does the Amsoil 05W 40 run?
|
All I can tell you is the oil temp runs about 5 degrees cooler. I change it at about every 6k miles. Did not know that about the M1 new formula, just read a comparison test where it out performed the old formula.