RLXXI

It's difficult to keep your foot out of it with a custom tune because it's soo much fun to drive, but if you baby the throttle hwy only I have seen 25mpg. Around town it's about the same or less due to the fun factor.

f150tamer

How much $ is a good tune rnlcomp? I have the 5.0 also and just really worry about warranty issues if it's tuned

RLXXI

I bought my tuner from stage3motorsports and it came with 5 custom tunes from 5* IIRC I paid about $400 for that and I spent another $500 for the extended power train warranty they offer in the event of a failure and Ford blames it on the tune.

http://www.stage3motorsports.com/201...ogrammers.html

I also bought a custom race tune from MPT, think I paid about $60 just for that one tune.

jkenprice1

Which tune do you use to get 25mpg and what rear ratio do you have?

RLXXI

91 Performance/tow and 3:31 2wd. I'll never see that again because now my truck is lifted and larger tires.

I was getting an over all at the time of almost 22mpg mixed city/hwy.





.

MGD

If you are saying this, it's probably best if you wait until yer factory warranty runs out. Otherwise, you will just continue to worry. Ford can - and will - make yer life hell if they choose to for any potential warranty claim.

Some reading: http://www.stage3motorsports.com/Sta...-Warranty.html

Also - IIRC, this extra coverage has never been 'tested'.

Lastly - call up some other tuning vendors ( MPT, VMP, JDM, etc) and get their perspective on the 'programmers and warranty' situation.

BTW - be prepared to datalog and return those logs for review (it's a 'value-added' service that should be part of the custom calibration purchase you made - if it isn't, you bought from the wrong vendor). And it's crucial to complete the circle that is remote mail-order custom tuning.

MGD

Troponin

Keep in mind that a tune from a good tuner doesn't just boost engine performance, it also boosts transmission performance. This increases dramatically with newer vehicles. With more optimal shift points at certain throttle positions, possibly a change in redline if the engine is capable of handling it, and sometimes more positive shifting, that alone can make a huge difference.

Just make sure you have a good tuner though. You want something that is going to be worth it, but it's so easy for a bad tuner to wreck your engine and transmission. Make sure to go with someone that is very familiar with tuning your particular vehicle and set up.

jkenprice1

Thanks. That was great mpg.

f150tamer

Thanks for the info guys that helps a ton

ArmyGuy45

Do you have to put in 91 octane with that tune?