rider Posted February 13, 2017 Share Posted February 13, 2017 Topic came up on a classic car forum but seeing more and more owners are parking their Supras up for extended periods this might be interesting information, or it might not be, on how the fuel composition changes on sitting in a vented tank over time and what impact that can have on air/fuel ratios. I was surprised at the data but there is no information around storage conditions of delta around the ambient temperature so its a limited in its scope. The shelf life of fuel in sealed solid (not transparent) containers is reckoned at around a year. BP fuel - Petrol life in vehicle tanks Quote Link to comment Share on other sites More sharing options...
bignum Posted February 13, 2017 Share Posted February 13, 2017 I don`t and wouldn`t use BP because its crud-fact, However i had some month old v-power in mine just after christmas and went straight to oulton caned it round all day and never noticed any difference. Quote Link to comment Share on other sites More sharing options...
mplavery Posted February 13, 2017 Share Posted February 13, 2017 (edited) I had a full tank of fuel which sat for just over two years as I didn't want the tank to rust inside Due to the age of the fuel I didn't boot it due to old fuel... just drove it normal until I had to fill up which didn't take long lol Weather it would of caused any damage or not I don't know but didn't want to risk it Edited February 14, 2017 by mplavery (see edit history) Quote Link to comment Share on other sites More sharing options...
Wez Posted February 14, 2017 Share Posted February 14, 2017 I had half a tank of V-Power that had been sat there for about 5 years, it would not start. Drained tank, dropped in some new VPower and fired up first time So yeah fuel does go off. Quote Link to comment Share on other sites More sharing options...
TheTurtleshead Posted February 14, 2017 Share Posted February 14, 2017 I had a full tank of fuel which sat for just over two years as I didn't want the tank to rust inside Due to the age of the fuel I didn't boot it due to old fuel... just drove it gently until I had to fill up which didn't take long lol Weather it would of caused any damage or not I don't know but didn't want to risk it The tank is plastic! Quote Link to comment Share on other sites More sharing options...
Jellybean Posted February 14, 2017 Share Posted February 14, 2017 (edited) It is the addition of Ethanol content or if you are running E85 might be an issue I was reading up on Fuel the other day , considering a few of us have the Charcoal Canister removed , vented to air as opposed the OEM sealed system Cars are sitting up during the week , the exposure to the air from what I read caused the fuel to loose its potency quicker , not too sure if it is negligible, maybe the vent line has a not return check valve on it , unless vacuum is applied it remains shut Edited February 14, 2017 by Jellybean (see edit history) Quote Link to comment Share on other sites More sharing options...
mplavery Posted February 14, 2017 Share Posted February 14, 2017 (edited) The tank is plastic! HA HA really ! that was a waste filling it up then yea i did actually know that don't believe you, going to check when I get home Edited February 14, 2017 by mplavery (see edit history) Quote Link to comment Share on other sites More sharing options...
Ric Posted February 14, 2017 Share Posted February 14, 2017 Yes plastic tank lol. only the stone protector is metal. Quote Link to comment Share on other sites More sharing options...
ShawnPreece Posted February 14, 2017 Share Posted February 14, 2017 I was having a similar debate with my Dad at the start of winter because of my Supra being sat for a while during the build... If leaving it off the road for a good 6 months if not even slightly longer which of the 2 options would be better... A) Filling the tank up to full so that it has a greater volume of fuel to turn bad so potentially take longer to go bad because of the consistency or B) Leaving the volume of fuel down to a minimum so that you can fill up with fresh fuel sooner and use bad fuel for less time (although potentially being worse fuel for that time because of less volume to attack and go bad) Assuming this is how it works of course as im not up on science and chemical reactions etc... lol Quote Link to comment Share on other sites More sharing options...
Ric Posted February 14, 2017 Share Posted February 14, 2017 6 months is fine, i regularly left my cars over 8 months between fillups and not had a single issue. This kind of thing takes years Quote Link to comment Share on other sites More sharing options...
mplavery Posted February 14, 2017 Share Posted February 14, 2017 6 months is fine, i regularly left my cars over 8 months between fillups and not had a single issue. This kind of thing takes years Same, a few times I have left my car standing for a few years and never had problems starting the car Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted February 14, 2017 Share Posted February 14, 2017 If planning on storing the car for a couple of years you could just leave a small amount of fuel in the tank, then before starting it top up, pull the fuel feed and bridge the pump to drain the first litre or 2. I'd also crank it a few times without the EFI fuse to circulate the oil before staring, but that's a whole other topic! This is of course playing it safe, plenty I know would just hook up the battery, start it up and drive, probably be fine too 90% of the time Quote Link to comment Share on other sites More sharing options...
Sheefa Posted February 14, 2017 Share Posted February 14, 2017 I fill mine to the absolute brim over winter and then run it every other week for a 10 minutes. I top up any used with E85 As Simon said BP is absolute cr@p and should never be used in your Supra. Quote Link to comment Share on other sites More sharing options...
BoGlE Posted February 14, 2017 Share Posted February 14, 2017 What fuel would you recommend? I always used to use Tesco's 99 but recently I've done afew fill ups with bp. How do they get away with charging so much if it's sh*te lol Quote Link to comment Share on other sites More sharing options...
Wez Posted February 15, 2017 Share Posted February 15, 2017 If I want to use decent fuel I always go for VPower, for normal unleaded and diesel I use any brand Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted February 15, 2017 Share Posted February 15, 2017 BP fuel is crap, Esso isn't much better. Supermarkets are crap aside from Tesco 99 but mines fussy! Spits it's toys out and starts pulling the timing on boost unless it's Vpower or E85 so that's what she gets. Stick any old fuel in the run around though! Quote Link to comment Share on other sites More sharing options...
MattP Posted February 15, 2017 Share Posted February 15, 2017 (edited) I think you lot are thinking too much into this as stated the fuel tank is plastic as is the filler upto the cap so rust I wouldn't worry about. With regards to fuel quality degrading over time I spend allot of time around Marine Engines some more advanced than the 2JZ running higher compression and boost levels and more sensitive to bad fuel (water contamination etc) some not so advanced (Yank V8 crap). some owners stick dry fuel in to counter condensation some don't the end result is generally the same no problems with starting or running under load on generic petrol most leisure boats can go well over 12 months without being started aswell. I always leave the Supra for 6 months at a time with barely any fuel in over winter and its fine I am more concerned with keeping salt away from it TBH haha. Always used Tesco 99 if anybody cares but V power performs exactly the same hell I ran all my older Jap scrap on normal 95 and never had any problems actually that's a lie I had a Rev 2 MR2 Turbo that didn't like 95 and ran lumpy until I filled it up with 99. Edited February 15, 2017 by MattP (see edit history) Quote Link to comment Share on other sites More sharing options...
Fizzy T Posted February 15, 2017 Share Posted February 15, 2017 When I bought my car it was stood for over 5 years in Essex out in the elements, fired up after two chugga duggas on a fully charged battery. Ran perfectly fine but I did toodle to the petrol station to put £30 worth of fresh fuel in it before it's mot. Quote Link to comment Share on other sites More sharing options...
MattP Posted February 15, 2017 Share Posted February 15, 2017 When I bought my car it was stood for over 5 years in Essex out in the elements, fired up after two chugga duggas on a fully charged battery. Ran perfectly fine but I did toodle to the petrol station to put £30 worth of fresh fuel in it before it's mot. are you the guy who bought that UK spec and welded a new radiator support in? Quote Link to comment Share on other sites More sharing options...
Fizzy T Posted February 15, 2017 Share Posted February 15, 2017 Yeah that's me, it's still going strong. Quote Link to comment Share on other sites More sharing options...
MattP Posted February 16, 2017 Share Posted February 16, 2017 nice to hear you held onto it you got a rare bargain. Quote Link to comment Share on other sites More sharing options...
berg Posted February 16, 2017 Share Posted February 16, 2017 I use whatever fuel is closest at the time Tesco 99, BP Ultimate and Shell VPower all run exactly the same in my car and ive never noticed a difference in performance or the way it drives with any of the above fuels Quote Link to comment Share on other sites More sharing options...
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