Fuel consumption: What is 99 Current?

[Joe98]

I did some off roading with my Jeep group.
When we aired down, I zeroed the fuel consumption measurement.
We stayed in a nearby motel overnight and in the morning I checked the fuel consumption.
It reads 20.4 litres per 100k

What is "99 Current"?

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[swflfireguy]

That's your MPG or in your case, l/100Km. When you reset it, it shows a very high number, like when you're coasting or braking. Reset it and then take off from a light , it will show a very low number, then rise as you get up to speed into a higher gear. HTH

 

[dchemphill1]

That means you can go over 1600 miles on a tank of gas!

 

[Reinen]

It's your current MPG. The gauge tops off at 99 MPG.

You really are getting 99+ MPG at that moment if, for example, you let your foot off the gas and coast down a hill. Unfortunately you can't do that forever and you'll see when you go up a steep hill you'll drop to 2-3 MPG. It all averages out to a more reasonable MPG number.

That gauge is really helpful in figuring out exactly what kind of driving gets what kind of MPG. In a Jeep it's not exactly intuitive. For example there is a major MPG difference between doing 80 MPH on an empty highway compared to using ACC and planting yourself behind a truck doing 65. Doing 80 on an open highway actually gets worse MPG than doing 25 MPH in 4WD on a bumpy rutted trail.

 

[Joe98]

In the photo above, I was in Park.

Ok, so I switched to the same screen whilst on the highway. The 99 field was replaced with 6. Meaning 6L/100k

In Park, I don't use fuel. So, in the above photo, the 99 should read infinity or read 0. A IT boffin would say it is a display issue.

 

[Jim1964]

The display is correct.

“99” is infinity when coasting for the MPG folks. Miles are the numerator. No fuel is used, while distance is accumulating.

Its also infinity when idling parked for the metric users. Because the fuel is the numerator.

If you want a numeric display to switch to reading infinity, you probably should have bought a German car.

 

[aldo98229]

On my Sahara, which is set for MPG, when I’m stopped at a light the “Current MPG” display reads “ — “ instead of 99+ .

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