Unless you've got an aftermarket chip, I suggest trying a tank of 89-octane midgrade. I know, I know...but seriously, when I did it with my Jetta the MPG went up noticeably. I get about 30mpg on the highway now, whereas I used to get about 26 using 92-octane. I'm not sure why this happens, but it's true! Just a suggestion.
Also, burning a quart of oil every 1500 miles seems like a lot to me. You might want to get that looked at.....your piston rings could be going. Charlie '89 Jetta GLI 16v Dave M. wrote: > Hi everyone, > > I recently joined this list and I think it's great! I have a whole slew > of questions, which I'll try to space out a bit. Here's the first one: > > We bought a 1990.5 GLI early this year, which ended up needing more work > than I originally thought. One thing I really dislike is the poor MPG. It > gets about 24 hwy, and 20 city. Is this normal? It seems REALLY low to me. > The engine is stock, runs pretty strong, and I recently replaced the oxygen > sensor, catalytic converter (core busted), EGR amplifier, checked the EGR > valve, replaced front brakes (they're not dragging), and replaced cap, > rotor, & plugs (Bosch silver tip). No change, still 24h/20c. The only clues > I have is that some dark smoke is visible from the tailpipe under load > (acceleration). It's not a big cloud that's visible in the mirror, but a > car following can see it. The car consumes about 1qt of oil (Mobil-1 > 15W-50) every 1500 miles or so. I feed it Chevron premium, the California > special MTBE/oxygenated crap. > > Any ideas on what's causing this? The plugs look OK, so I don't think it's > running insanely rich. But the cat was broken when we bought it, which > would back up the theory that it's running rich. Is there any sensor or > switch I should be investigating? > > Thanks in advance! :-) > > Dave M. > Sacramento, CA > 1990.5 GLI - 110kmi > _____________ > List Sponsor: http://www.netsville.com > To remove yourself from this list, send mail to [email protected] with > 'unsubscribe a2_16v' in the body of your message > See us on the web at http://www.a2-16v.com > Visit the 16V Homepage at http://www.gti16v.org _____________ List Sponsor: http://www.netsville.com To remove yourself from this list, send mail to [email protected] with 'unsubscribe a2_16v' in the body of your message See us on the web at http://www.a2-16v.com Visit the 16V Homepage at http://www.gti16v.org
