Calculating Mpg question

[rvadventure]

Originally Posted by mr_d

it takes many thousands of miles to get an accurate fuel mileage. I'm getting 7.6 over 47,000 miles. On the flats my silverleaf shows 13 to 15 mpg and on a hill around 3 mpg. Wish i did more flatland driving.

wow thats pretty good considering the weight and i engine size! About the same as i get with a lot less power. Just shows engine doesnt work as hard, and an experienced driver.regards

[DGBPokes]

Here is an app I got for my iPad, been tracking every Fuel purchase d on our three vehicles. Time, and many purchases smooth out all the variables described above.

[Winemaker2]

I do as others stated - ignore gen usage
I do use a spreadsheet to do the calcs and i've added a column with last three fill-ups / miles averaged.
The running avg takes out any minor variation due to more / less fill and varying road conditions.

I don't obsess over the numbers but it is useful to see if there is an unexpected decline. When driving my old gasser it gave me a clue when it was time to check the air filter and clean the mass air flow sensor.

[rssnape]

I use an app on the phone called road trip. It allows you to put in multiple vehicles and gives statistics galore. If you don't fill up for a particular reason, hitting a button for not filled will average until the next fill up. Pay at the pump having to enter card multiple times, it has a built in calculator to total the gallons.

What I do is enter the fuel allotment for the generator under its heading and then enter the remainder for the coach. I use 1/2 gallon / hr for generator.
I have been using it for every fuel burning vehicle I own, except for the lawn mower.

http://itunes.apple.com/WebObjects/M...298398207&mt=8