Interesting read..sit back ,grab a coke and be informed..although its about Jap cars alot of the info here is relevant, I especially like the read on the K&N's and what it does to the oil.....theres also some interesting results about Royal purple,,,,, makes you think

http://www.nissanclub.com/forums/eng...s-results.html

 

Did you read this on Royal Purple?

https://www.chevyhhr.net/forums/lounge-10/royal-purple-gets-busted-22975/

 

Yup..the write up above talks about LOSS of milage using RP..thought that was interesting..

 

And..an oil shootout!

http://www.performanceoilnews.com/oi...nst_oils.shtml

Its oil change time for both my HHR's so I did a little reading.....

 

Yeah. But if you change it every 3000 miles...

 

....your wasting money..you can't go wrong at 3,ooo miles,but if you can afford it,sure. Otherwise its like changing your bath water half way thru the bath................

 

I have a Chevy Diesel truck and when I was active on the Diesel forum there was a guy there that worked at one of the big oil testing labs. He swore he could always tell from the results when an engine was using the K&N filter and always sent back the results with a recommendation to get rid of the filter if they wanted their engines to last. A few members tried calling BS on him and he bet them he could tell them if they used the filter or not if they sent him their oil for testing. He was never wrong. He said he could tell from the indications of solids in the oil that it had a K&N.

Never used one of them again.

 

I will just stick to my Mobil 1 and AC Delco filter from Wal-Mart...

 

The discussion involves the air filter affecting the oil not your oil filter.

 

So I went to the link, miles and miles of info.
To save us all a little time, what is the conclusion of using a K&N type filter?