I have a 99 with close to 150k miles. runs great. Super fast and strong, no smoke unless I mash on it. I have had it a bout a year and and have always thought the mileage was subpar. I get 300-350 gal on a tank. I avereage out the last 4 tanks and with mostly stop and go LA traffic, with a little open freeway here and there, I got an average of 18mpg.

I have recently changed the oil and trans oil + the fuel and air filters. I have also replaced all of the fuel deliver lines.

What else can be going on?

My best guess is that it has to do with another thread I am going to post later this week, but I'll put a bit of that here maybe it will help.

From the day I got the car I always thought the rear end was loud. I bought it with bald back tires, so I went out and replaced all 4. In 6 months my rear tires were down to threads ( I drive the car pretty nice and do not burn out or put on high miles). Since I bought the tires used I figured I must have been ripped off and not paid attention to the thread depth. I put another set on the back and now 5 months later they are almost bald. I have seen evidence of some sort of repair work to the trunk, so I am thinking it has been in a wreck. And I am now thinking that the rear end is not straight. The tires are work evenly, so it's not camber or toe, but I think if the whole axle were tweaked sideways that would give me the noise, the tire eating and most likely enough drag to cause the bad mileage?

Do I have this checked at a body shop or an alignment place?

Thanks for ANY input.

- Dylan