I just filled up with petrol and fuel gauge reads 468 on dashboard. I have seen this much higher, even 625 when I got the car I seem to remember?. From previous experience I have seen the gauge go up after a while. Am I going mad?.
It estimates range based on recent mpg history ...
Am I going mad?.
You're not looking at a fuel gauge, you're looking at a range prediction. As others have said that will vary as you drive. Somewhere there'll be a tank level indicator (usually a series of bars that reduce as you use fuel).
Thanks everyone. I searched online. Here is answer
Range
Shows the estimated distance you can travel on the remaining fuel. This distance is estimated from the fuel economy of your previous trips.
That is true but it doesn't explain why it is a fixed figure immediately after filling up. I don't suppose it really matters a hoot, it's just that I have now got interested.
The Mk3 may be programmed to initially always show 426 miles, probably a typical average for the car.
No I dont know for sure, and I may be wrong. But on this issue its a logical enough explanation for me. Sometimes ignorance is bliss :-*The Mk3 may be programmed to initially always show 426 miles, probably a typical average for the car.
That was my guess. You clearly don't know either. The MK3 obviously operates differently than the MK4. Anyway it is irrelevant.
On the Mk4 if you top up when the fuel gauge on the right is showing full or just one bar off full, the range estimation doesn't usually update from what it was before you filled up.MK4 computer recalculate distance to empty always after fuel pass 92% of fuel tank capacity, when you topping up tank to full from empty computer shows what you can get from full tank by judging your previous tank mpg, but why it’s recalculate after passing 92% ?
An update on my 467 range after resetting trip when I topped up tank.And looking at things the other way round, with the metre set to return to zero after a fuel refill, I had 357.7 miles done and 264 as range (so 621.7 miles on that rather economical tank) on the way to the petrol station but 580 miles after filling up. So, clearly, the range estimate is not based purely on recent driving. I'm now wondering whether it's taking the life history of the car's consumption figures.
Looking at my range it’s now 501 plus I have completed 91.3 miles so looking like 592.3 for my tank of petrol. I still got 10 bars on right. Probably be much changed in a day or two.
The computer probably initially calculates based on the nominal tank capacity of 40 litres. The float gauge shows its full ,so its assumed to be 40 litres.An update on my 467 range after resetting trip when I topped up tank.And looking at things the other way round, with the metre set to return to zero after a fuel refill, I had 357.7 miles done and 264 as range (so 621.7 miles on that rather economical tank) on the way to the petrol station but 580 miles after filling up. So, clearly, the range estimate is not based purely on recent driving. I'm now wondering whether it's taking the life history of the car's consumption figures.
Looking at my range it’s now 501 plus I have completed 91.3 miles so looking like 592.3 for my tank of petrol. I still got 10 bars on right. Probably be much changed in a day or two.
MK4 computer recalculate distance to empty always after fuel pass 92% of fuel tank capacity, when you topping up tank to full from empty computer shows what you can get from full tank by judging your previous tank mpg, but why it’s recalculate after passing 92% ?I like this theory. But is it based on known fact? If so I would be interested to read the source.
That because fuel capacity of tank that bigger then 92% not measured in MK4. If tank filled 93-110% it’s full for fuel gauge.
I reading car sensors data using OBD2 port and application - Car scannerMK4 computer recalculate distance to empty always after fuel pass 92% of fuel tank capacity, when you topping up tank to full from empty computer shows what you can get from full tank by judging your previous tank mpg, but why it’s recalculate after passing 92% ?I like this theory. But is it based on known fact? If so I would be interested to read the source.
That because fuel capacity of tank that bigger then 92% not measured in MK4. If tank filled 93-110% it’s full for fuel gauge.
...it suddenly showed within 4-5 seconds 235 ... 240 ... 245 ... 250 ...255
When I looked again 2-3 minutes later it was showing 306m and another few minutes later, 287miles.
In my Mk.3 today, range was showing 241m which dropped by 1m at a time to 235. I was a bit surprised to see it falling as the road was slightly downhill
After following a tractor for a couple of miles, it suddenly showed within 4-5 seconds 235 ... 240 ... 245 ... 250 ...255
When I looked again 2-3 minutes later it was showing 306m and another few minutes later, 287miles.
Remember - that fuel has weight - so the more you use - the better the consumption ( when the ice is in operation), or put another way - take the tank down to almost empty, and NEVER fill right up - ( unless on a long journey) - if it town quarter full is more economical.Well i some time ago checked that because i not have money to fill full tank and already reached reserve of fuel in tank 5.7l, i filled 5 liters and reset trip A and B fuel econmy, i got same figures that i get with full tank, but that may be because of my weight :D.