Except exercise and strength building generally increase the body's longevity unless you go to far and wear it out!

One other note on the chip tuning, odds are it won't increase economy because it can't alter timing. On my car, I opted for larger elements which gave it a "crapload" of power and the increased combustion efficiency has raised my highway mileage to 34 with a peak of 37.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250