Thorin Posted December 5, 2008 Share Posted December 5, 2008 Following on from this... http://www.mkivsupra.net/vbb/showpost.php?p=2195744&postcount=109 I stuck another 5l of petrol in from a can... started straight away. Now it was low, just touching the empty line, but that should have been plenty to get me to the garage. I've had it down to the top part of the "E" before! Guess I'll fill up sooner now then. Quote Link to comment Share on other sites More sharing options...
Burna Posted December 5, 2008 Share Posted December 5, 2008 That is odd. Wonder why it's different this time. Quote Link to comment Share on other sites More sharing options...
caseys Posted December 5, 2008 Share Posted December 5, 2008 Temperature of fuel surely has to be taken into account? As remember when you buy at the pump you're buying by volume and temperature will affect density of the petrol you buy - more value for money on cold days. So my speculation is that fuel density will affect this? Quote Link to comment Share on other sites More sharing options...
Burna Posted December 5, 2008 Share Posted December 5, 2008 Temperature of fuel surely has to be taken into account? As remember when you buy at the pump you're buying by volume and temperature will affect density of the petrol you buy - more value for money on cold days. So my speculation is that fuel density will affect this? But surely the gauge would still indicate what level the fuel was at? Quote Link to comment Share on other sites More sharing options...
Stonkin Posted December 5, 2008 Share Posted December 5, 2008 Temperature of fuel surely has to be taken into account? As remember when you buy at the pump you're buying by volume and temperature will affect density of the petrol you buy - more value for money on cold days. So my speculation is that fuel density will affect this? are you saying that if i put a litre of fuel in on a cold day, i will get more fuel than if i put a litre in on a warm day? Quote Link to comment Share on other sites More sharing options...
Burna Posted December 5, 2008 Share Posted December 5, 2008 are you saying that if i put a litre of fuel in on a cold day, i will get more fuel than if i put a litre in on a warm day? It's what they say, heard it a few times over the years. Apparantly in the summer it's best to fill up in the middle of the night/early hours to get more petrol for your money. Don't know if it works Quote Link to comment Share on other sites More sharing options...
Stonkin Posted December 5, 2008 Share Posted December 5, 2008 Blimey, never heard that Quote Link to comment Share on other sites More sharing options...
caseys Posted December 5, 2008 Share Posted December 5, 2008 Blimey, never heard that Anything sold by volume will be worth more if pumped at a colder ambient temperature. Gas/Liquid always becomes denser as temperature comes down and they take the next step in form Gas -> liquid -> solid (anyone with a physics/chemistry degree please correct me if wrong). As for how much you gain on buying petrol when it's pumped at say -5 degrees C than if it was at +20 degrees C, I couldn't say. Take helium for example, a cubic litre of helium in gas form will have a lot less in it than a cubic litre of helium in liquid form - which it gets to at a very very low temperature. (admittedly the pressure/cooling required to store it will be immense). I am curious actually with LPG if they keep it at the same ambient temperature all the time, or if you get bigger/smaller gains when buying on a colder day than petrol. Quote Link to comment Share on other sites More sharing options...
edge Posted December 5, 2008 Share Posted December 5, 2008 Blimey, never heard that There was a thread on here a few months back on how to save fuel. It mentioned buying in the morning when the temp was cooler etc. Im sure someone who can be bothered will find it. Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted December 5, 2008 Share Posted December 5, 2008 Do you have an aftermarket fuel pump? Quote Link to comment Share on other sites More sharing options...
Thorin Posted December 5, 2008 Author Share Posted December 5, 2008 No, stock OEM j-spec. Quote Link to comment Share on other sites More sharing options...
Burna Posted December 5, 2008 Share Posted December 5, 2008 Do you have an aftermarket fuel pump? What was you thinking behind the question Gaz, just interested Quote Link to comment Share on other sites More sharing options...
tbourner Posted December 5, 2008 Share Posted December 5, 2008 http://www.snopes.com/inboxer/household/gastips.asp Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted December 5, 2008 Share Posted December 5, 2008 What was you thinking behind the question Gaz, just interested If the tank's been cracked open and fiddled about with the sender might read incorrectly - this happened to me. I was seeing 3/4 of a tank when it was full to the brim. An easy fix but it was quite perplexing at the time Quote Link to comment Share on other sites More sharing options...
Burna Posted December 5, 2008 Share Posted December 5, 2008 If the tank's been cracked open and fiddled about with the sender might read incorrectly - this happened to me. I was seeing 3/4 of a tank when it was full to the brim. An easy fix but it was quite perplexing at the time Thanks Gaz I get it now Quote Link to comment Share on other sites More sharing options...
ivan Posted December 6, 2008 Share Posted December 6, 2008 Sticking fuel gauge sender I reckon. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted December 6, 2008 Share Posted December 6, 2008 Just clean the fuel level sender, should sort it. When fuel is colder the sg (specific gravity) changes so it becomes denser, you get more for your money. But its not a massive amount Quote Link to comment Share on other sites More sharing options...
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