Desert Captain wrote:
Break out the popcorn and batten down the hatches.... here come the K&N haters. :B How dare you even infer that a K&N works well and... Gasp, might just improve your mileage. LMAO!
I've been running K&N for 15 years with nothing but good results. My current CAI paid for itself after about 3 years of not buying the expensive paper filters. While I did not buy mine seeking better mileage I have seen a small improvement and do get a little extra power, about 5%. I also believe that having the Leer shell contributes to improving my mileage and I know for fact the Scan Gauge has added a 9% improvement both towing and non. I also love my Icon Direct Wind Deflector which adds 1.5 to 2.0 additional mpg towing, it paid for itself in 6,000 miles/one year.
Believe or don't as the spirits move you but I know what works for me. My 2006 F-150 SCab 5.4L averages 17 around town, 19.5 on the highway at 65 and 12.5 towing the 5K# TT. I think all of the above improvements combine to generate the good numbers I consistently see (on the Scan Gauge and verified at every fill up), but never underestimate the efficiency of a well educated, light right foot. Nice to be retired and in no particular hurry. :B
Yeah. I only let it hit 70 once, when I wasn't paying attention. The 5.4 loves to run. If I don't hold it back, it would be doing 75. It seemed to get it's best MPG at a dash over 60. It has the 3.55 rear.