Hi,
Anyone here install a K&N Airfilter on your CX-9?
I have a 2008 Mazda CX-9 AWD GT with 3.7L Engine. K&N Filter 33-2395 per their recommendation.
I have been using a ScanGauge II for the last 4 months and during my 25 minute commute have registered about 22.7 to 23.1 MPG using factory paper filter. All highway.
Installed the K&N filter 3 days ago and now getting 20.5 to 21.0 MPG doing the same commute under pretty much the same conditions.
Decrease. NOT what I expected at all.
So I email their support team.
I asked about a break-in period and they said none is required.
They indicate (via email from Paul at K&N) that their is no guarantee with MPG improvement since their are so many variables. He only claims improvement in Horsepower in his first email (and 100% satisfaction gurantee or money back)
Then I asked, how can I show the improvement in HP using my ScanGuage][ and he replies "A replacement air filter typically gains between 1-4 whp, but there is no guarantee for a horsepower increase with a replacement air filter."
So in reality, there is no guarantee of any improvement other than not having to throw away my airfilter which I paid $50 + $10 for the cleaning kit and $9 shipping. That's about 4.5 air filters at $15 a pop.
Has anyone tried the K&N filter and noticed any MPG or performance improvement? If you did, please tell me how.
Thanks
Anyone here install a K&N Airfilter on your CX-9?
I have a 2008 Mazda CX-9 AWD GT with 3.7L Engine. K&N Filter 33-2395 per their recommendation.
I have been using a ScanGauge II for the last 4 months and during my 25 minute commute have registered about 22.7 to 23.1 MPG using factory paper filter. All highway.
Installed the K&N filter 3 days ago and now getting 20.5 to 21.0 MPG doing the same commute under pretty much the same conditions.
Decrease. NOT what I expected at all.
So I email their support team.
I asked about a break-in period and they said none is required.
They indicate (via email from Paul at K&N) that their is no guarantee with MPG improvement since their are so many variables. He only claims improvement in Horsepower in his first email (and 100% satisfaction gurantee or money back)
Then I asked, how can I show the improvement in HP using my ScanGuage][ and he replies "A replacement air filter typically gains between 1-4 whp, but there is no guarantee for a horsepower increase with a replacement air filter."
So in reality, there is no guarantee of any improvement other than not having to throw away my airfilter which I paid $50 + $10 for the cleaning kit and $9 shipping. That's about 4.5 air filters at $15 a pop.
Has anyone tried the K&N filter and noticed any MPG or performance improvement? If you did, please tell me how.
Thanks