just like the title says. i daily a 2003 s10 2.2L 5 speed manual. i can get a tune for $200 from my local tuner who tuned my racetruck silveraydo. The s10 2.2L puts down somewhere in the ballpark of 85-90rwhp stock. So basically i can run faster than it. It was getting 25mpg, i gutted the cat and it jumped to 27mpg. Is a tune worth it? think i could see 29mpg or better? im probabaly gonna put a header on it regardless since its $100 with the downpipe and my current flexpipe is leaking.