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.