[bensanford]

Can you trust the car's calculated average L/100km or mpg?

I know that with my Volvo, the car's reported mpg is greater than what I calculate when I use the mileage since my last fill-up divided by the amount of fuel to fill the tank again.

[3.0L]

Originally Posted by bensanford

Can you trust the car's calculated average L/100km or mpg?

I know that with my Volvo, the car's reported mpg is greater than what I calculate when I use the mileage since my last fill-up divided by the amount of fuel to fill the tank again.

And I'm not totally sure the odometer is 100% accurate. Probably the best method would mileage from a good road map divided by the gas pump reading.

[SteveInfante]

Originally Posted by Maynard

So did you really AVERAGE 72mph over a 1600mile trip? Impressive cannonballing for sure. Usually people only drive that fast getting away from Syracuse

Why yes I did. I drove up on a Friday and came back that Sunday. Spent the weekend golfing. I was mostly keeping up with traffic. I drove straight through on major highways the whole time.

[Moki808]

Originally Posted by raleedy

Nice. Auto, or manual transmission? (OK, just saw your update above about the AT. I think it does significantly better than the MT, although my car also has the older engine.)

Also, how do you turn Olympia to Portland into a 400-mile round trip?

It's approximately 400 miles total when you include lots of driving around Portland and environs

[raleedy]

Originally Posted by 3.0L

And I'm not totally sure the odometer is 100% accurate. Probably the best method would mileage from a good road map divided by the gas pump reading.

In my experience BMW odometers are pretty accurate (assuming no mods to wheel/tire circumference) even though the speedometer is not.