 | Home > Puma (Tdci) > Defender 90 MY 2015/2016 fuel tank size |
 
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| nik h Member Since: 09 Nov 2015 Location: Herts Posts: 19   
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Thanks All for the replies to date.
Some more info from a super Aussie site aulro.com "this is from the RAVE service manual (pages 801 - 804) Fuel Tank Capacities Variant Fuel Tank Capacity 90 - 56 liters (13.2 gallons) 110 (130) - 70 liters (16.2 gallons) A warning lamp is incorporated in the instrument cluster and illuminates when the fuel level is at or below 10 litres (2.64 US gallons). LOW FUEL INDICATION AND RUN DRY STRATEGY The run-dry strategy is used to maintain the systems fuel prime at fuel run out. It ensures the minimum amount of fuel is always left in the swirl pot. The instrument cluster activates the yellow low fuel warning light, (next to the fuel gauge) with 15% of fuel remaining in the tank. The fuel gauge will indicate empty with 11% of fuel left in the tank. With 4 liters left in the tank the run-dry strategy will be invoked. An engine mis-fire will be induced for approximately 1 mile after which the engine will be shut down. The engine can be re-started in mis-fire mode and will continue to run for a further mile until the engine shuts down again. This can be repeated until the fuel suction port in the tank is uncovered and causes engine fuel starvation and loss of prime. Re-starts after run-dry shut down are not recommended" It's a bit different again to what we've seen published by LR elsewhere. Very informative and all stemming from me trying to find out the actual size of my 90 tank and when the 'low' light comes on. So, I think that my capacity is 55, maybe 56 litres main tank + 30 litres additional tank = 85 or 86 litres. I'm still able to refuel with 70+ litres when the 'low fuel' warning light and beeps come come on - having put in 67 litres 40 + miles into 'low'. It looks like my Defender's 'low fuel' trigger is set at around 15 litres. Is my assumption that the LR fuel tank is a common item irrespective of export destination fair? All the best, nik h |
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2nd Jan 2016 6:32pm |
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| Supacat Member Since: 16 Oct 2012 Location: West Yorkshire Posts: 11018 
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Are you making the assumption that you fill the tank on the first click - if so you need to take account of the fueling strategy:
"A breather spout within the tank controls the tank 'full' height. When fuel covers the spout it prevents fuel vapor and air from escaping from the tank. This causes the fuel to 'back-up' in the filler tube and shuts off the filler gun. The position of the spout ensures that when the filler gun shuts off, a vapor space of approximately 10% of the tank's total capacity remains." |
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26th Jan 2016 8:32pm |
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| nik h Member Since: 09 Nov 2015 Location: Herts Posts: 19
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Thanks for that Supacat - good point.
So could that mean, if I have 55 ltrs main tank + 30 ltrs ancillary tank capacity in theory, that in practice I'm only going to fill to 85 -10% = 76 ltrs max from 'empty'? If I'm being warned at 15% full then that would explain why I'm 'filling' with 76 - 15% say 64 ltrs. This stacks up to what's actually been happening - if my logic and maths are right! Very helpful. Appreciated. Thank you again. nik h |
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26th Jan 2016 9:48pm |
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| mcgiver Member Since: 12 Sep 2015 Location: brisbane Posts: 23 
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thanks from me too Supacat...here in Australia knowing your fuel requirements and capabilities is always on your mind
when passing the last fuel stop for 500kms.....? |
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28th Jan 2016 10:57am |
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| nik h Member Since: 09 Nov 2015 Location: Herts Posts: 19
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Dear All,
It's been a while. Just sharing in case it's helpful to anyone in the community: I have on a number of occasions filled up - to the first click - with 75 lits. At this stage the yellow light has been on for 30 - 40 miles. One of the LR communications stated that the buzzer and yellow light will come on when there are 9 lits. left in the tank. This make sense now, more so than the other, perhaps conservative numbers quoted in earlier emails, including my own. The other relevant number is a consistent mpg of just over 30 ie 6.6 miles per litre. I'm on 20k miles now and have enjoyed Defender ownership very much to date. All the best, h |
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27th Oct 2017 12:44pm |
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| zsd-puma Member Since: 09 Aug 2016 Location: Kent Posts: 2720 
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The low fuel warning may well come on at 12 litres, (most manufacturers give you about 30 miles fuel reserve), but then when the fuel level drops below a certain level (sounds like this would be 5 litres) the engine stops to prevent you having to bleed the system when you refil the tank and run the injectors dry. So it's a 60 litre tank, but you can't really use the last 5 litres, to protect the fuel system, so in practice it's 55 litres. |
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27th Oct 2017 2:37pm |
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