Fuel Gauge accurate?
Discussion
I have not even got a Griffith yet, 
but I am actively searching, 
so all I have at the moment is time on my hands thinking about driving a Griff this summer. 
This led me to thinking - fuel consumption - tank size - and how accurate are the fuel gauges generally.
Do they log remaining fuel pretty accurately or are they notorious for diving from half full to empty in 10 miles. 
You might think this is getting too far down into the minutiae, but please understand that dreams are all I have at the moment!
and this is a sort of serious question that I would like to know the answer to before I find out the hard way. 
Thanks
but I am actively searching, so all I have at the moment is time on my hands thinking about driving a Griff this summer. This led me to thinking - fuel consumption - tank size - and how accurate are the fuel gauges generally.
Do they log remaining fuel pretty accurately or are they notorious for diving from half full to empty in 10 miles. You might think this is getting too far down into the minutiae, but please understand that dreams are all I have at the moment!
and this is a sort of serious question that I would like to know the answer to before I find out the hard way. Thanks
) to calculate consumption and drive on the number of miles covered between refuelling. Oh, and have a big safety margin. 
Hi Dutchone,
As the other guys say...go on miles covered and not the gague. When I refuel, I let the gun 'click' a couple of times to indicate full but the gague only shows just over 34 full. I am convinced that when i get to a 14 there is nearly half but I am not going to find out the hard way!!!
As with my whole 'TVR' experience, they are great cars but the money has been spent on the performance and not the 'electrickery'. My speedo doesnt start to register until i am going about 20mph as well!! Quality!
Good luck in finding one, you wont regret it!!
As the other guys say...go on miles covered and not the gague. When I refuel, I let the gun 'click' a couple of times to indicate full but the gague only shows just over 34 full. I am convinced that when i get to a 14 there is nearly half but I am not going to find out the hard way!!!
As with my whole 'TVR' experience, they are great cars but the money has been spent on the performance and not the 'electrickery'. My speedo doesnt start to register until i am going about 20mph as well!! Quality!
Good luck in finding one, you wont regret it!!
Painey said:
I'm probably being over-cautious but I never let my fuel gauge get much past a quarter empty/full!!!
Agree with this! I found that even on just less than 1/4 full a hard left hander would make the remaining fuel swill in the tank and cause an air bubble to go through. Like on a roundabout on the A1 - you can imagine the situation - approach with gusto in outside lane, take roundabout with spirit, straighten car up on opposite side ready to light blue touch paper and overtake other inside-lane traffic and.... splutter...fart...fart...cough. A couple of hundred yards further down the road and things would start to happen again (including ruddy embarrassed cheek colour
)Its accurate...ish.
If you brim em and then drive em, it is fairely accurate. If you stop, leave em, start again, then you strangely find you seem to have lost about 10-20% of fuel in your gauge !
For what its worth, I reckon my 4.3 holds 50ltrs. The last reckoning I did was putting in 64ltr's and covering 335 miles...equates to about 23.5 mpg. That a mix of M-way driving, around town and 20-40mph over the Pennines in snow/slush/hail/blizzard on Xmas Eve. So reckon on fuel consumption of 22-25mpg depending on what you do.
If you brim em and then drive em, it is fairely accurate. If you stop, leave em, start again, then you strangely find you seem to have lost about 10-20% of fuel in your gauge !
For what its worth, I reckon my 4.3 holds 50ltrs. The last reckoning I did was putting in 64ltr's and covering 335 miles...equates to about 23.5 mpg. That a mix of M-way driving, around town and 20-40mph over the Pennines in snow/slush/hail/blizzard on Xmas Eve. So reckon on fuel consumption of 22-25mpg depending on what you do.
I agree with everyone else about the fuel gauge, most either over or under read but in a predictable way once you know your own car.
Don't let it put you off buying though, if you are that bothered the 'bible' has very clear instructions on how to recalibrate the gauge by adjusting the sender in the tank. Mine under reads by about 1/8th (i.e. shows it is empty before it really is) so like most others I've got used to it.
Best of luck with the search
gooner
Don't let it put you off buying though, if you are that bothered the 'bible' has very clear instructions on how to recalibrate the gauge by adjusting the sender in the tank. Mine under reads by about 1/8th (i.e. shows it is empty before it really is) so like most others I've got used to it.
Best of luck with the search
gooner
When my tank's full, the gauge reads empty - because the float is so high it's off the sensor track! When I use a bit of fuel, and the float connects the sensor, the gauge reads full, then drops as you'd expect as the fuel gets used. Once passed the initial 'oh shite there must be a hole in my fuel tank' phase it seems reasonably accurate.
Dutchone said:
I have not even got a Griffith yet,
This led me to thinking - fuel consumption - tank size - and how accurate are the fuel gauges generally.
You might think this is getting too far down into the minutiae, but please understand that dreams are all I have at the moment!
Thanks
No gauge is calibrated on these cars but they tend to be of 'repeatable performance' so you will get used to what you have in the tank. I used to reset the trip every fill and repeat at 200/220 miles. worked for us for 4 years
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