quote:
Originally posted by GeorgeCLS:
Just as balance here, I had test vehicles that I ran side-by-sides on: OEM AC and K&N.. One of our K&N equipped vehicles had the pistons rattling in the cylinders at 22,000 miles. The AC equipped, same job, same conditions, went on to 120,000+ miles..
We had to replace the engine in the K&N at 35,000 miles due to oil consumption, etc.. That was worse case: best case K&N had triple the amount of dirt, wear metals compared with AC equipped vehicles..
This was in an extremely dusty environment, worst case scenario...
But, just for balance...