I'd say a sohc saturn is comparable to your g20 in everyday use. I've driven my fair share of SR powered cars. The saturn would probly loose in a long race though.
derange how many miles are on the g20? I would think that it could do better than 21mpg. Auto or manual? I bet it needs an o2 sensor replaced.
The SR20 is a pretty good motor. It can be really sensitive to the weather though, for example, on cold days it feels wayyy more powerful. I know any car will experience this since cold air is denser, but the change is way more then other cars I've driven through the seasons. I really want a DET motor!
Creeping up on 80k. It's an automatic, and as far as gas mileage I just hate how slow it is so I used to be rather liberal with the gas. The current tank I'm on I'm hypermiling and so far the needle hasn't even dropped below "F" and I've gone close to 50 miles. I haven't checked the O2 sensors, but I'm getting it in for service in a couple of weeks when I have my fall break (since I won't have school I can drive my other car daily) and I'll probably have them check it out.