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S60 & V60 '11-'18 / XC60 '09-'17 General Forum for the P3-platform 60-series models |
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How much fuel left when Reserve light comes on?Views : 27791 Replies : 86Users Viewing This Thread : |
View Poll Results: What do you do when the fuel reserve light comes on? | |||
I never see the reserve light come one. I always fill up before this happens. | 61 | 34.46% | |
Head straight to the nearest fuel station. | 17 | 9.60% | |
Trust the trip computer about the remaining range, but make sure I don't push my luck. | 75 | 42.37% | |
Wait until I see "--- miles remaining". I have still never run out of fuel. | 24 | 13.56% | |
Voters: 177. You may not vote on this poll |
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Apr 6th, 2016, 14:49 | #1 |
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How much fuel left when Reserve light comes on?
I did my first proper tank refill yesterday on my D4 FWD Manual.
I am used to computers that fib as to how much fuel is left (my Toyota would say I had a range of 20 miles when I could put on 55 litres in a 60 litre tank). Anyways, being dumb, and making a 70 mile motorway journey, I ignored the Reserve light (which came on at around 50 miles left) and went off the trip computer telling me the range left. When it got to 20 miles left I decided to leave the motorway and get to a fuel station. On the slip road (uphill) the range went from 20 miles left to "---" and stayed like that for 2 miles to the petrol station. I was expecting to get about 65 litres into the fuel tank. I actually managed to put in 73.08 litres - definitely NOT something that I am proud of Bear in mind the tank is officially 70 litres, plus the plumbing from the filler cap. Incidently, I managed 777 miles on the tank and averaged 48.33mpg with a mix of - about 500 miles on the motorway, locked in cruise control at 56mph - an indicated 58 mph on the computer - hey, they always overestimate, but GPS never lies - about 200 miles on decent windy A-roads, speeding. - the rest around town So, from here on I will search for a fuel station when the reserve light comes on. Has anyone ever run out of fuel, or run the fuel levels so low they got more than 73 litres in? Last edited by dcr69; Apr 6th, 2016 at 14:57. |
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Apr 6th, 2016, 15:04 | #2 | |
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Quote:
The fuel tank holds 70 litres but the station fuel pump might not be accurate. The range left is a product of the last few miles you drove but if the level in the fuel tank falls too low the computer cannot do an accurate calculation so you just get the dashes. The fuel system can be ruined on a diesel if it completely runs out of fuel. A friends car now has a fit of the jerks at random ever since she ran out of fuel. People who have done it here have been OK though. Volvo do warn not to run out of fuel in the handbook. In my friends case the main dealer is saying the only way to fix it is to replace the whole fuel system.
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Apr 6th, 2016, 15:25 | #3 |
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The fuel station pump has to be accurate. Trading standards check them every so often. Some people talk about secret storage in cars that mfrs don't tell owners about. Sounds a bit conspiracy theory to me but maybe that is true.
One possible theory is the amount fuel expands and contracts. When the tank is first checked the temperature will be whatever, let's say 20°C. When you filled up recently, bearing in mind the fuel is stored underground, it may be 6-8°C. This would reduce the volume of the fuel so that you can get more in than if the temp was the standard level. I have only got to 0 miles left once and it was by accident. The car I was driving was quite new and would drop suddenly at the end and I was not near a fuel stop. I drove meticulously at 50mph and was quite pale. I now get no lower than a quarter before filling. Lesson learnt.
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Apr 6th, 2016, 16:29 | #4 |
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I've never done it in my XC60, but like Harvey, I did do it in a BMW once coming out of London late at night.........I think the range said 1 mile just as I pulled into the garage......never been so worried (it was about 12.30pm, I didn't know where I was, and I had no sat nav).
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Apr 6th, 2016, 16:38 | #5 |
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I left the house this morning with 120 miles of range left. Shortly after leaving the fuel indicator went red, with 110 miles range left. Add in some cold engine miles, uphill motorway and wet conditions and 5 miles later the range said 65 to go....
Stuck with it and 47 miles later range was back to 75 to go. Only needed 67 litres to the first click of the pump. Most I've managed to squeeze in was 75 litres. I had totally brimmed the car and also had, from memory, 20 miles indicated range left before I started filling up. |
Apr 6th, 2016, 16:41 | #6 | |
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Quote:
The most I've ever filled is 69 litres but I don't have the nerve to go any further.
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Apr 6th, 2016, 16:52 | #7 | |
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Quote:
But worry not because the pump is measuring the fuel as it is drawn at the temperature of the storage tank, and not after it has expanded to air temperature. The average 15°C temp change between the storage tank to the car tank increases the amount of fuel by approximately 0.5 litre in an average size tank full. That expansion also dilutes the amount of energy in each litre making the MPG less in summer than in winter by about 8%.
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Apr 6th, 2016, 20:01 | #8 | |
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Apr 6th, 2016, 20:09 | #9 |
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If you look on the fuel pump there will be a sticker telling you when the pump was last tested. Not sure if Trading Standards do it any more, more likely to have been put out to contract
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Apr 6th, 2016, 20:10 | #10 | |
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