Quote:
Originally Posted by sammyg2
Modern engines don't dirty up filters unless the engine is damaged and eating itself up, and by then a filter won't help.
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Bingo!
Effectively controlling condensation in the crankcase, mitigating any blow-by gases, and drastic leaps in engine management technology have brought us to where we are today. The result is longer service intervals, and less critical component wear, thus, an engine can go a quarter million miles without a major overhaul, where 30 years ago, you'd only expect 100k.