Quote:
Originally Posted by TLK
Reread my post above. This always happens to the BMW V8’s once you’ve got enough miles on the valve seats. They cost less than a dollar a piece, but it’s $6000 to tear down and replace them. I’ve done it on two so far. I’ll probably sell the M5 before I reach that point.
The oil burning will cause the car to fail smog, it will eventually kill the O2 sensors and the catalytic converter.
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This is why SapphireM5 never took his M5 over 4500rpm.