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Originally Posted by VQ35Sleeper
so which in your opinion will be best?
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I've used Mobil-1 filters for a long time (over 10 years) with apparently good results. Right now, I'm running what I plan will be a 5k mile run with a M1 filter, after which I will do an oil analysis. Next, I plan to do the same with a K&N installed. It will be interesting (at least to me

) to see whether the finer filtration of the M1 or the better flow of the K&N seems to show up as a noticeable UOA difference. I'll be happy to post my results when they come in. I think, however, that you'll be fine with either filter so long as you use them for a reasonable time/mileage interval.