I ran across someone on eBay that custom programs chips for OBDI GM vehicles and he said I can get an increase 6-7 mpg, 25-30 HP and 30-40 torque with his chip. The chip is only $105 delivered and a money back guarantee. What do you all think? I currently have a 1990 Chevy Sub. and get around 16 after a tune-up so +7 mpg would be awesome.
http://cgi.ebay.com/ebaymotors/Chevy...9648QQtcZphoto