does those drop-in filter really make a difference? if so which is better trd or k&n...

 

No performance gains with a drop in

 

Both will migrate filter oil to the MAF sensor. Better off with the Denso dry filter. They're inexpensive and expendable. I ran a K&N for 15 minutes and put it back on the shelf. No difference in performance.

 

thanks for the info

 

TAMMY,
You are correct about the K&N. I have had them on every car I owned since 1986, but I am finally convinced that they are not as good as I thought. The light came on in my head when I realized how many MAF sensors I have changed on my cars in the last few years.

I am in the process of removing all the K&N filters and replacing them with factory dry filters. Once I service the K&N, I realize that I probably over-oil them, causing MAF problems, AND possibly rapid contamination of engine oil.

My last oil analysis revealed a high level of silica (sand), and they suggested that the air filter may be contaminated or compromised. Either way, the filter is letting dirt into my engine and rapidly dirtying the oil.

That is IT for me and K&N filters....I'm DONE!