MPGuino gets me within distance of 55mpg

[mobythevan]

OK, so I slacked off this winter and didn't log mileage. Well, to get back into things I got the MPGuino installed in my 98 HX and the first tank shows 54.87mpg. I am excited about this because this tank was average weather and average traffic conditions. I believe I can maintain this all the time. The mpg figure was from odometer and gas pump gallons(the same way I have figured all log entries), not from the guino readings. It is still being calibrated so I just use it to know when I can maximize mpgs. Having the instant feed back changed my driving habit a lot. I am excited for the warmer temps to get here. I find myself trying to squeeze out every last bit now to try and raise that trip average.

[moorecomp]

And once you get the calibration down, it is amazing how accurate the MPGuino can be. My calibration is complete (after a year) and I routinely see my miles traveled are within 1 mile of the odometer after a 400 mile tank (.25%) and the gallons are within less than .1 gallon on a 10 gallon fill (< 1%). Of course the gallons are hard to keep consistent, but I have been using the same pump and technique for a while, so it all evens out in the end.

I also noticed you have been using a correction for the tires you are using, so you can build the correction factor into the calibration of the MPGuino and you don't have to do the math!

[mobythevan]

Well, I'll be filling up on the way home tonight. MPGuino is showing the same mpg as last tank, slighlty better. We shall see what the odometer and pump shows. I think I will average the first two tanks and then use that number to correct the microseconds/gallon to calibrate the MPGuino. I still got caught by a lot of bad weather on this tank, the wind has been horrible in Colorado for the last week. That is suppose to let up tomorrow. It is snowing today

[user removed]

Nice work. It hit 93 degrees here yesterday. I think it was a record. I was trying for 77+ MPG in the Insight, but got caught in a small traffic jam for about 10 minutes and ended up with 75.9 MPG.

55 in a HX is exceptional, congratulations, especially in cold conditions.

regards
Mech

[mobythevan]

Getting this mpg isn't easy, a lot of coasting and rarely over 50mph even in 60mph zones. I try not to make people mad by driving slow, it usually works out OK. I can make sure when they reach me I am in a good spot so they can overtake me easily.

[mobythevan]

OK, I got spanked. Time for more research/thought. Guino showed same average for last two tanks at 50mpg, also showed same gallons used at 8 gallons. The first tank took 7 gallons to fill at the pump, the second tank took 9 gallons to fill at the pump. I am not seeing how there can be a 2 gallon difference in the pump. Filling location was flat and I ran the pump half speed. I'll just keep averaging tanks and see if I can figure out the 2 gallon mystery.