hi guys has anyone on here have had any good luck with tuners or chips? I have an 01 f150 screw with a 4.6 in it im getting 16.4 mpg and was wondering if i could get any better or is that the norm? Ive just recently done the gotts mod and changed my plugs and serviced the engine only thing i havent done is the fuel filter thanks in advance.

 

Your mileage is about right depending on how you drive and your routes you travel.
Changes to the intake looking for more mileage for normal driveing use won't gain anything.
The stock system flows more than enough air. Same filter and intake is used on the larger 5.4 motors.
Many people jump on fuel filters looking for better mileage.
It's old thinking in relation to fuel injection..
A restricted filter would run the motor lean and produce a code to match.
Normally the fuel pump produces pressures above 90 psi then is regulated down to the 38 psi range +/- so you can see the filter only stops dirt getting into the injectors.
The trouble would only begin if a filter restriction were to match the fuel regulator pressure then the pressure to the injectors begins to drop running the motor lean.
Once that happens the OX sensors try to richen up the fuel until the fuel tables go out of limits. Then the code is set.
When it would go that far, you would only find it with a fuel pressure test or just get lucky changing the filter and not know what had happened.
More than you wanted to know but we aim to help.
Good luck.