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Originally Posted by Lil bastard
Men do indeed drive Boxsters!
The recommended Air Filter change interval is at 40k mi. But, that assumes 'Ideal' conditions, which almost no one encounters.
Drive frequently on the freeway, dirt roads, past construction zones, desert, wet or humid climates, high rpms, and you need to shorten the service interval. How much shorter? Can't say, no interval has been established.
Personally, I'm confortable pulling my paper filter every 10k mi. and blowing it out, from the reverse side, with compressed air. I replace every 20k mi.
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Yep... I'd say my car falls under the 'severe' category. So, for $20, might as well. That and it was on the original filter when I picked it up last summer, so I feel bad. Only had 12k miles, but yeah... it was pretty shot.