[civicefficient]

I have a 2000 Honda Civic EX (automatic) and have improved to 46 mpg with mainly highway and nice 45 mph roads using an UltraGauge.

My biggest challenge is a mountain that gains ~1040 feet with upto a 8% grade on my daily commute. It is 3 miles long with average grade of 5.7%! On another side of this mountain they do hill climb races.

I've tried doing it at 40 mph and 50 but it is a mess either way. I loose to much speed to even limit to 2500 rpms and often it hits 3000 rpm. I try to hit the slope with extra speed. Rough estimate is I can only get 22 mpg on this section. The two lane each direction road is 45 mph.

Any suggestions on how to approach this and perhaps do a few test runs?

P.S. Do any websites do eco-routing driving directions?