John Deer Boy: you're right. Performance picked up again. The control system must be using adaptive software. Whew! I was afraid I had blown it.

dimprov, can you put your year and trim level in your signature?

I updated my signature. I hope it shows up when I do this post.

I guess the software adapted, because I have my performance back.

I'm getting about 20.5 miles/gallon on mostly freeway driving. Does that sound about right for a 1996 SSEi? Do high speeds drop performance by a lot, or is that mostly an old wives tale? I obviously realize that will be some impact, but my SSEi is more aerodynamic than a truck. I'd like to figure roughly what an extra 20 miles per hour is costing me. If it'* more than my day job, then I guess it will "pay" to go slow now that gas prices are so high (now $2.65 per gallon for premium).

For a city driver, what'* the rule of thumb for how often to change the air filter? It seems so subjective. The last time for me was about 10,000 miles ago.

The higher the speed the lower the gas mileage. Plain and simple. The fewer WOT sprints, the better your gas mileage. Change to a 3.4 pulley..you'll notice there'* a direct connection from your right foot to the hole in the bottom of the gas tank. (I'm not complaining..I'm addicted to the feeling)


Air filter...when it is dirty. it'* not the type of driving as much as where and in what kind of air quality.