jethro

Ok I feel like an idiot for not knowing how to this...but I don't know how to see how many MPG I'm getting. Can someone please explain.

humanoid

Go to your local gas station and do a fill up. Run your tank down to near empty. Fill up your tank and then divide the number of miles you've driven (from the first fill up to this fill up) by the number of gallons you put in during this fill up. Example, I drove 240 miles between my last fill up and this fill up. I fill my rig up with 14.736 gallons of gas. 240/14.736=16.286 (roughly). I've averaged 16.2 MPG for that tank.... Understand? If you don't just PM me or reply to this thread.

Glenn

1. Fill up tank.
2. Write down the mileage on odometer.
3. Next time you fill up, look at odometer again and write mileage down.
4. Divide the difference into how many gallons you needed to fill up.

Tacoma Dude

Like these guys said - remember the less gas in the tank at refill, the more accurate your number will be.

foxtrapper

And do this several times, averaging out the results. Sometimes you fill a tank more then you do other times.

HondaTec521

How's Elle May doin'

gwhayduke

These guys are all correct. Easy way?

Total miles driven divided by amount of fuel used.

Miles divided by gallons

Miles per gallon (per means divide...remember this)

Miles goes in the house and gallons stays outside.

On a calculator, key in the miles first, then the divide symbol, then the gallons of gas used, then the equal sign (=).

Of course, if you're driving a Land Cruiser, you'll have to learn scientific notation.

And to thank me, you can send over Elle May's daughter.

lee

easiest way to keep track of mileage is clearly to use one of the two trip-ometer things.

Glenn

It should be mentioned that this method only works if your speedometer/odometer is accurate. If you have made tire size and/or gearing changes, it will throw the whole works off. One way to check the accuracy of your odometer is to verify with GPS.

grams72

Mine is 5 mph off,

How in the he11 can I figure my actual miles.....

gwhayduke

You're going to have to stop at a highway mile marker, zero your trip odometer, then drive a known distance...say 10 miles.

At the end of the 10 miles, stop (be precise).

Note the mileage on you odometer...For illustration purposes, say it's 9.3 miles.

Your correction factor will be 10 miles / 9.3 miles or 1.08 which rounds to 1.1.

So the next time you fill up with gas and reset your trip odometer, you'll take the mileage from your trip odometer and multiply it by your correction factor to get the corrected mileage.

Glenn

5 MPH at what speed? That would help.

GPS would also help. If there is an REI near you, you can rent them.

Rick F.

I record my fuel mileage in a pocket planner I keep in the center console at each fill-up. At the end of the month, I average out each data point for that month. It has helped me identify that something may be amiss (low tire pressure, wheel alignment, etc.) that impacts fuel economy. I also record every maintenance task I perform so I have close-at-hand info.

Tacoma Dude

GPS would be better, however, if you don't have access to one and your fairly confident that a tire calculator will work for you - you can get the miles that you run, input into a tire calculator, and use that end total to get your MPG.
The tire calculator I'm talking about is the kind that gives you the speed difference. You can input your total miles there - the same math should apply.

grams72

Its off at all speeds, I have a GPS, Thats how I figured out I was off.

I will use it to check my odometer, Should be able to figure out a conversion once I get the numbers.