wow you guys are lucky. im only getting about 22 mpg city and about 29 highway. of course that could be from having 205000 miles on it. unless you guys have any other ideas why mine sucks gas so bad. its a 97 gl mtx. i know the upstream o2 ssensor is going bad and im going to replace it as soon as the new comes in.
i hooked up a vacuum gauge and ive only got about 20 inhg at idle. i thought it should be closer to about 30. any other ideas would help.
