2009 SRT8 Challenger

2009 SRT8 Challenger

Saturday, May 23, 2015

How Does A K&N Air Filter Work With the 6.1 Liter Hemi?

Many years ago a friend of mine suggested that I use a K&N air filter in one of my vehicles. He told me that my gas mileage would improve. He also said that the filter would improve the horsepower. This guy was a former competitive drag racer, so I trusted his opinion! When it was time to replace the air filter, I tried a K&N; and I noticed a significant improvement in gas mileage.

If you drive a muscle car, you probably don't care about gas mileage. I'm not the normal horsepower fanatic since I'm always looking to save a few dollars on gas when possible. One of the things I like about a K&N filter is that they last forever! I clean mine once a year, and it goes right back in the engine compartment. No more buying paper filters every 3,000-6,000 miles!




The 2009 should get a combined 15 MPG according to fuel economy.gov


I watch the fuel efficiency report on the dash occasionally. I have noticed (over the past 6 years) that I usually get around 21 MPG on the highway and interstate (if I keep my foot out of the accelerator). I'm sure there is an improvement in horsepower, but I have never tested this. We drove slow (35 mph) on some back roads tonight. After the short cruise, you can see in the photo below that the computer shows 19.8 MPG. I should also mention that I only run 93 octane unleaded gas in the car.


I still use the stock air intake in my car. I purchased the K&N air filter element that fits the stock setup back in 2009. When I go in for an oil change, I make sure to tell the service personnel that I have a K&N filter. I don't want them to discard this important investment!

I made sure to put the K&N notification sticker in plain view!

Stock air intake with K&N filter inside.


As always, do the research for yourself before you invest in any accessories for your vehicle. For more information on this topic, Google the term "lifetime automotive air filters." I've been pleased with K&N filters on all our cars. Each installation has resulted in improved fuel economy! 

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