Just thought I'd pop in and ask a question or 2... I've noticed one member that goes 4 months between fillups, some go monthly. I drive 130 miles a day (65 miles one way to work). I usually fill the tank 3x a week.
27.4 miles round trip for my daily commute with 90% of that trip being Highway driving to suit my VX. That is for every day that students have school...so that equates to 174 days a year. Which means that 4767.6 miles a year come from that job. Then there are the random trips to friends' houses to work on cars and the odd jobs I do during the summer to keep a flow of income.
I fill up anywhere between 10 and 20+ days depending on trips to friends' houses.
Just by driving to work and school I do around 170 miles per week. That comes to 24 miles per day (but it would be higher then that because I do other driving too). So 25-35miles per day would be a good guess. And 2 weeks per tank seems about average.
2008 EPA adjusted:
Distance traveled by bicycle in 2007= 1,830ish miles
Average commute speed=25mph (yes, that's in a car)
I'm driving 40 miles each way, plus the daily trips to the driving range at lunch for mental decompression from my job. If I can push my CRX HF over 50 mpg, I might be able to pull off fillin git once a week.