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Old 01-27-2013, 02:48 PM
Ricardo567 Ricardo567 is offline
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Location: U.S
 
Join Date: Mar 2010
Posts: 28
Mein Auto: BMW 1994 325IC
I don't think driving at high speed to maintain high RPM won't make the valve stem seal failure premature. BMW is designed from Europe and they can run no speed limit at Autobalns, as the fourth longest highway system in the world (7,982 mi). When driving at 120 mile/hr the rpm will boot up to 5,000 roughly.
To me, extended idling periods, driving in the city (stop and go frequently), oil changing interval, and brand of oil contribute to the valve stem seal failure premature.
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