I've had KE filters in my 400E for over 100K miles. No problems. Can't comment on before and after mileage but car does get 27 mpg in hot weather interstate driving at 70 mph. Car has 128K on it.

I've had a KE filter in my 944turbo track car for over 55K miles. No problems. I installed the MAF system 8 years ago. It came standard with the system.

This argument goes on and on and probably will never conclude. It's almost like an argument about religion. No one will have their mind changed....

BTW, I also use green antifreeze. My SL is 25 years old. The green stuff has not harmed it or allowed it to be harmed. But I do change antifreeze every 24 months.

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Lawrence Coppari

2002 SLK32 AMG
2005 Acura TL
1987 328GTS
1986 944T