5 replies to this topic

[SKIDDERWOLF]

Because I’m lazy and don’t fancy draining the tank to find out roughly what should the fuel gauge be reading when the fuel level in the tank is at the top of the sender hole - this is from peering down the filler neck. My gauge is reading as 1/4 full.

[Quinlan minor]

My old flying instructor cautioned me "Only believe a fuel gauge when it says 'Empty'.", so that's what I calibrate mine to.

The tank neck will show you when it's full, record the odometer reading. Run it as close to 'Empty' as you dare. Fill it again, record the odometer again, divide the difference by the volume and you've got your consumption figure and your range. If you add the range to your odometer reading you'll have a figure by which you'll need more petrol.

[bpirie1000]

Wooden stick was the choice device when I was a student....

[MiniMadRacer]

My father worked at a Austin / Morris / BMC/ BL main dealer (main stealer as we called them), his view was always, its a guage, ie an estimate, an indication not a gtee...I always had BL old bangers, first thing we did was put a gallon of fuel in the back in a can and drive it on quiet roads very local until it ran out of fuel, we then knew how accurate the guage "wasn't",  and we had a gallon of fuel in a can to get home with, but.. that was in the day when a carb was £5 (uk money) from a scrap yard, and fuel pumps were prob 50p (UK money), so we didnt care about sucking up the "crap" from the bottom of the tank, and I was paying probably £60 for a mini with road tax and an MOT on it (UK), slightly different today if you block your electric pump or injectors, probably costing you hundreds of uk pounds

[Chris1275gt]

I just clock the mileage when I fill up. I get about 38-40 to the gallon X 7.5 tank capacity = 300 miles a tank full. So you can then see what the guage is showing after say 75miles 150miles 225 miles etc, etc.

Edited by Chris1275gt, Yesterday, 10:46 PM.

[Steam]

Because I’m lazy and don’t fancy draining the tank to find out roughly what should the fuel gauge be reading when the fuel level in the tank is at the top of the sender hole - this is from peering down the filler neck. My gauge is reading as 1/4 full.

Sounds about right, use a rule and measure the tank, a 1/4 tank will be around the sender hole as you found.