Fuel Guage Vs Computer

[*Badger*]

How accurate do you guys reckon the computer is in regards to mileage remaining in the tank ?
For example, my 172 reads 1/4 of a tank on the guage, but the computer claims to have 150 miles left ? Is that possible ?

Dave

 

[sk311y]

dunno but myn reads 1/4 of a tank and the fuel light comes on!! lol only happend a few times tho...

 

[dave1980]

i think there is a reserve even when its on the red, my renault megane diesel used to be on the red and still have 65 miles left before it ran out (according to the computer) and that was on the bottom of the guage.

taking that into account that probably is about right.

 

[Steve2004]

I always use the computer. That fuel gauge is well dodgy. lol


In fact, scrap that, I only really use the low fuel warning light. :S

 

[-Leigh-]

I rely on the gauge, and the fuel light. The computer isn't all that accurate I've found. I have been driving along before, with low petrol and it has told me that I had around 80 miles left, then 2 mins down the road it was telling me I had around 40 miles left lol.

 

[daydotz]

65miles then my fuel light came on then the trip went blank on fuel an mpg they lie

 

[Tyson-182]

My fuel light came on, the computer said i had 40 miles left and only used 9.0 gallons of fuel, then if you continue the computer goes blank, so i travelled a further 25 miles, and i was still fine, albeit slightly nervous about running out of fuel, the gallon went to about 9.8, then i filled up. I'm not sure what is accurate, because i'm sure 182 have an 11 gallon capacity, yet fuel light, and computer either comes on or goes blank when in theory you still have 2 gallons of fuel left? Weird.

Tys.

 

[Ian_182]

Thay are so far out that people actually believe they can get 48mpg from a 2.0 petrol engine

 

[*Badger*]

Mine reckons i am getting about 33mpg with combined driving so that sounds about right, just the mileage left in tank seems a bit high.....

 

[Tyson-182]

I average 33mpg, but yea, i do agree the fuel/milegae is whack!

Tys.

 

[Bjorn]

Is the computer meant to work out the mpg per tank or for the whole of the cars life, so rolling. Mine was on about 29.4mpg before i did a 2000 mile trip mainly motorway and i only got up to 31.3mpg by the end of the trip.
Can that be right?

Oh and i never use the fuel guage, its up and down like hoars draws.

 

[Tyson-182]

^^ If you reset your trip computer before that trip, i'd imagine that your mpg would have been closer to 40mpg...

 

[Bjorn]

Think i did, it got to 1K miles then it went back to 0 again.