99.9 miles per gallon???

[Jeg Norge]

anyone had this happen? lol. wish it was for real!

[Naz24]

yup, if your gliding down a hill, your instantaneous MPG will be 99.9, that would NOT be your average! as much as i wish it was

[Viperfreak2]

Verwissen. A km speedo, Celcius temp, km distance travelled, then PM (not 24hr) and miles per gallon?

[Jeg Norge]

Originally Posted by Viperfreak2

Verwissen. A km speedo, Celcius temp, km distance travelled, then PM (not 24hr) and miles per gallon?

for mpg i can switch it to metric in idrive. im sure you can too. but im used to reading mpg.

[AzNMpower32]

That's because with the torque converter locked up, the engine uses no fuel. Technically the computer sees 0 l/100km, but there's no good sign for "infinite" US mpg.

As folks around here know, I use metric readings, so that means km, °C, 24 hr clock, l/100km consumption, and I ignore the mph on the speedometer. Legally, I switch over the odometer to miles once a year for the state safety inspection.

[Jeg Norge]

Originally Posted by AzNMpower32

That's because with the torque converter locked up, the engine uses no fuel. Technically the computer sees 0 l/100km, but there's no good sign for "infinite" US mpg.

As folks around here know, I use metric readings, so that means km, °C, 24 hr clock, l/100km consumption, and I ignore the mph on the speedometer. Legally, I switch over the odometer to miles once a year for the state safety inspection.

locked up? i didn't notice anything strange while driving...

[JCL]

It isn't when the torque converter is locked up, that happens both up and down hills. It is when you lift your foot off the accelerator going down a hill, and the engine is in over-run, ie turning faster than the throttle setting calls for, like when you are engine-braking down a hill. The fuel injectors shut off in that condition.

[Viperfreak2]

My old Cadillac read 999.9 mpg going down hills....and 3 going up!

[motordavid]

I can peg that '99.9' regularly, in the ol'X5, or the ol' Vette whenever I idle down our 4 mile mtn road, in gear with no gas. Both are manual trans cars, fwiw.

Pretty normal, imo.
GL, mD