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| Third, OK...OK...I now use the original equipment Audi oil filter with
| check valve...I'm the FRAM bastard, remember? Is Mann supposed to be
| better or same?
Whoops! I just bought a used '92 CS100Q and took it down to one of the
local quick lube services for an oil change. What should I know about the
oil filter? What does the check valve do? Assuming they put a basic
Fram filter on, should I immediately go to the dealer and get one with
the check valve? What would happen if I didn't?