Tuner like “5 Star Tune “

mkirsch wrote:
Tuners won't do anything for engine output on a normally aspirated gas engine. That's already been maximized by the manufacturer.

All tuners do is give your subconscious a lead foot so you stomp on the pedal harder, say, "YEAH! I HAAAAAAVE THE POWERRRRRR!" to yourself, then find out three days later that nothing really changed and there's a hole in your wallet where several hundred dollars used to be.

Ive tuned 3 different gas vehicles now. Every one of them had a noticeable improvement. The manuf tunes them for a variety of people and driving styles.
The first was my Excursion. I did it for the improved shift strategy, and it helped. It also gave a bit more performance. And I did notice a .5mpg improvement when towing.
I just tuned my MH.and let me tell you this made the biggest improvement! The factory tune is lethargic at best. No throttle response, trans not knowing which gear it wanted to be in. Computer pulling throttle when I need it the most. After the tune, the Mh feels 5k lbs lighter. The trans knows what it wants when it’s needed. No more hunting for gears and losing 10mph on the slightest of grades (coming up out of river valleys). And best of all I gained .6 mpg.
So unless you have done a tune you really cannot comment on them one way or another.

BTW, we’re talking custom tuning here, not a canned tune that only changes ignition timing.