colt_f150

Actually it's a fact for him. It's your opinion that they wouldn't last, but in his cases - it has worked out.

WXman

Actually, no, because since he's run nothing but tunes he has no idea how much longer the engine and trans. would have lasted if they had remained stock.

I agree, you can't quantify this.

However, my opinion is that if you get a tune from a reputable tuner who knows what they're doing you should be OK for the period of time that most people own a vehicle. A "safe" tune is one that increases power without going over the design limits that the engineers had in mind originally.

I've seen pictures of tunes literally starting fires on trucks, and killing turbos on others.

RubberDuckie

FWIW I've had a SCT x3 programmer on my 2012 3.5 for 5 years now, have had custom tunes from 5* since 5k miles and the truck is currently at 107,XXX miles with no mechanical or electrical issues.

Z7What

Your basically optimizing the parameters for the engine/tranny so yes with a GREAT tune your engine should run just as long with a tune as it would without.

To say my statement is not true is impossible to say. I have read of people blowing stock tune motors at 30K miles but personally know someone that's tuned with almost 400K miles. There is just to many factors to say it's not true.

Wayne