[firehawk618]

Another thing is, you need to judge your true MPG's over tanks, not just a partial fill up or two.

The reason I say this is I also have a 98. I get pretty significant swings in calculated MPG's and I believe it's because the tank doesn't always allow the same amount of fuel to be pumped in. The only way to know for sure is track your tank/miles over time. Not just a 6 gallon fillup.

Probably the only way to get consistent full tanks is to trickle fill until gas is sitting at the top of the fill tube. I refuse to do this with a gasoline car because I don't want gas back filling my evap system and all that.

I would do the trickle filling regularly in my previous diesel vehicles.


With your car a scangauge OR ultragauge would be a great investment if you want to learn how to drive it better and maximize MPG's.

I recommend the Ultragauge for the following reasons:

1. It's much cheaper.

2. The display is much better.

3. You can display upto 8 parameters at once vs 4 on the Scangauge.

4. You get a selection of mounts with the Ultragauge for only a couple additional dollars.

Numbers two and three are all my personal opinions having owned both.