vbdenny

I immediately ordered and installed a K&N air filter. Not as easy as the old days with the wingnut, but still much easier than it looks. I have a brand new factory air filter in storage now which will never go on the car again. I clean the K&N filters about every 15000 miles and have them on all my cars. If you change your filter, do yourself a favor and replace with a high peeformance washable filter.

Walt White Coupe

If you change your filter, do yourself a favor and replace with a high peeformance washable filter.

Do yourself a favor and only replace the filter when you need to and do your engine a favor by keeping the more effective stock air filter that will provide the cleanest air to your engine.

DickieDoo

Seems better. Car seems to engage better off the line, i have an M7 and used to stumble a bit off the line. Then again, it's been last season that i had the car out.
Then again, this could be a placebo effect, the mind can play tricks on you. One measureable way to tell if there is improvement will be a fuel economy run that will beat my best of 7.0L/100Km.
Will keep you posted.

maxp

Curahee

37,500 or four years.

DickieDoo

Given that performance tends to degrade as the filter loses effectiveness, i find that this interval is too long. It's a relatively cheap part so why not have it performing optimally. GM used to have a gauge on their filters in the older gen SUV's that told you when to replace, like the Oil Life monitoring system, it should be replace when it needs to be replaced.
Checking the severe duty schedule, it says the same thing... that i don't get... it does not account for driving in dusty conditions or in areas where there are lots of pollens and allergins floating around in the air...

Walt White Coupe

Given that performance tends to degrade as the filter loses effectiveness, i find that this interval is too long.

Do a little research about "effectiveness" (assuming you mean the ability to transmit clean air to the engine) and you will find that the engine air filter actually gets "more" effective as it ages to a point. You pay for that increased "effectiveness" with slightly higher pressure drops (less air flow) across the filter.

DickieDoo

Yes, poor choice of words on my part, the filter becomes more effective filter even better but that implies less flow. I'll search up the youtube clip on oil analysis of K&N versus STOCK. It was very interesting and showed that for all intents and purposes, the K&N was doing a similar job to the stock element ( not that i am promoting K&N since i put in an AIRAID )