I installed a K&N filter system onto my Expedition today. The job was very easy, done in one hr. In the few miles I have driven with the new filter the computer tells me I have gain 1 mpg. this has been is short trips. looking forward to a long trip to see if there is better news.:
K&N filter on 03 expedition
- Thread starter CFR91
- Start date
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GAINMOB
Full Access Members
I think I gained 3 mpg from intake alone
PAcountryBOY
Member
I had the K&N 69-8431TP installed on my 03 Expy FX4 for a little while and gained +2 MPG on short trips and between +4-5 long trips. I ended up selling it and switching to the JLT RAI, which sacrificed some MPG for extra throttle response and torque. Still miss the extra time between fill-ups.
mindgame
Full Access Members
I know I have lost a shi* load of MPG... Must be the tires... 
Team Zombie
Active Member
more likely it's your front license plate restricting airflow
mindgame
Full Access Members
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