just john Posted December 11, 2011 Share Posted December 11, 2011 With Petrol expected to reach £2 per litre by end of 2011 these tips that I received from a friend might come in handy.TIPS ON PUMPING PETROLI don't know what you're are paying for petrol.... I am paying up to £1.35 to £1.50 per litre. My line of work is in petroleum for about 31 years now, so here are some tricks to get more of your money's worth for every Litre:Here at the Shell Pipeline where I work , we deliver about 4 million litres in a 24-hour period .. One day is diesel the next day is jet fuel, and petrol, regular and premium grades. We have 34-storage tanks here with a total capacity of 16,800,000 Litres.Only buy or fill up your car or truck in the early morning when the ground temperature is still cold. Remember that all service stations have their storage tanks buried below ground. The colder the ground the more dense the petrol, when it gets warmer petrol expands, so buying in the afternoon or in the evening....your litre is not exactly a litre. In the petroleum business, the specific gravity and the temperature of the petrol, diesel and jet fuel, ethanol and otherpetroleum products plays an important role.A 1-degree rise in temperature is a big deal for this business. But the service stations do not have temperature compensation at the pumps.When you're filling up do not squeeze the trigger of the nozzle to a fast mode If you look you will see that the trigger has three (3) stages: low, middle, and high. You should be pumping on low mode, thereby minimizing the vapours that are created while you are pumping. All hoses at the pump have a vapour return. If you are pumping on the fast rate, some of the liquid that goes to your tank becomes vapour. Those vapours are being sucked up and back into the underground storage tank so you're getting less worth for your money.One of the most important tips is to fill up when your Petrol tank is HALF FULL. The reason for this is the more Petrol you have in your tank the less air occupying its empty space. petrol evaporates faster than you can imagine. petrol storage tanks have an internal floating roof. This roof serves as zero clearance between the Petrol and the atmosphere, so it minimizes the evaporation. Unlike service stations, here where I work, every truck that we load is temperature compensated so that every litre is actually the exact amount.Another reminder, if there is a petrol truck pumping into the storage tanks when you stop to buy Petrol, DO NOT fill up; mostlikely the petrol is being stirred up as the Petrol is being delivered, and you might pick up some of the dirt that normallysettles on the bottom.[kiss] Link to comment Share on other sites More sharing options...
woolybanana Posted December 11, 2011 Share Posted December 11, 2011 Does that apply to diesel too? Link to comment Share on other sites More sharing options...
Théière Posted December 11, 2011 Share Posted December 11, 2011 Can't believe this is still doing the rounds.It's ok in theory but really depends where you live. In the Sahara when it gets wild temp fluctuations it would make a difference (probably) I would like to hear from clever person on the measured amount of vapour difference.Where we are middle France to southern UK the tanks are buried and temp fluctuations are minimal, on a cold morning you'll use more choke going to the fuel station early to fill up! You'll also hack me off if you are refuelling slowly to try and prevent releasing any extra vapour.In short get a life [:)] Link to comment Share on other sites More sharing options...
just john Posted December 11, 2011 Author Share Posted December 11, 2011 [quote user="just john "] One day is diesel the next day is [kiss] [/quote]I guess so, even if it's minimal perhaps still worth following; My fuel doesn't last that long anyway but I'm more worried about inhaling benzine . . . Link to comment Share on other sites More sharing options...
Théière Posted December 11, 2011 Share Posted December 11, 2011 Switch to LPG then [;-)] Link to comment Share on other sites More sharing options...
just john Posted December 11, 2011 Author Share Posted December 11, 2011 I tried it in my Audi Estate, it took up the spare wheel well, leaving the wheel in the cargo area, and after a few years needed a replacement cylinder head, when the Insurance Co demanded a new installation certificate that was the last straw and I traded it in. Too much hassle. Then I bought a Euro IV diesel estate and learn't about the cost of DPF failures . . . I'm driving both diesel van and petrol car, still looking for an estate replacement that doesn't require LPG or DPF Link to comment Share on other sites More sharing options...
Bob T Posted December 11, 2011 Share Posted December 11, 2011 Not that old rubbish again. It has been doing the rounds for years, so let us dispel one of the myths.Fuel is in underground tanks that are huge. The ground is at a fairly constant temperature, and so is the fuel. If the daytime temperature was 10C warmer than the night time temperature, then that might change the temperature of the fuel in 12 hours by about 0.01%. If you filled the underground tank in August and then did not touch it till December, you may find the fuel in it is half a degree cooler. If you pump 50 litres out of the nozzle in a few minutes to fill your car, then the fuel coming out of the nozzle will be at the same temperature as the fuel in the underground tank. Link to comment Share on other sites More sharing options...
John Brown Posted December 11, 2011 Share Posted December 11, 2011 I agree with bob TBefore I retired from Fleet Management I purchased over 1,000,000 litres of Fuel each year and can confirm it was delivered in 23,000 litre loads and was measured by meter at the point of delivery. Petrol has to be stored underground because it can't be pumped and has to fall into the storage tank by gravity so the tanks have to be able to accommodate at least a full delivery plus a good margin. All fuels are filtered and at ambient temperature going in the tank and out at the pumps so the myth about not buying fuel when a delivery has just been made is not worth considering. Link to comment Share on other sites More sharing options...
AnOther Posted December 11, 2011 Share Posted December 11, 2011 Hey guess what, turns out that there is an engineer working in a refinery in San Jose CA who miraculously also has 34 tanks with 16,800,000 gallons storage capacity and delivers 4m gallons per day, what an astonishing coincidence [Www]http://www.snopes.com/inboxer/household/gastips.asp Link to comment Share on other sites More sharing options...
nomoss Posted December 11, 2011 Share Posted December 11, 2011 [quote user="AnOther"]Hey guess what, turns out that there is an engineer working in a refinery in San Jose CA who miraculously also has 34 tanks with 16,800,000 gallons storage capacity and delivers 4m gallons per day, what an astonishing coincidence [Www]http://www.snopes.com/inboxer/household/gastips.asp[/quote]Yeah, but he copied that story from my friend, who works for Shell at Ellesmere Port [:D] Link to comment Share on other sites More sharing options...
just john Posted December 11, 2011 Author Share Posted December 11, 2011 Well whadyano! Can't be uggered to check every round robin at snopes, interestingly they support much of it[:$][Www] Link to comment Share on other sites More sharing options...
AnOther Posted December 11, 2011 Share Posted December 11, 2011 All the best hoaxes have an element of truth in them, makes them more believable [;-)] Link to comment Share on other sites More sharing options...
sid Posted December 11, 2011 Share Posted December 11, 2011 [quote user="John Brown"]I agree with bob TBefore I retired from Fleet Management I purchased over 1,000,000 litres of Fuel each year and can confirm it was delivered in 23,000 litre loads and was measured by meter at the point of delivery. Petrol has to be stored underground because it can't be pumped and has to fall into the storage tank by gravity so the tanks have to be able to accommodate at least a full delivery plus a good margin. All fuels are filtered and at ambient temperature going in the tank and out at the pumps so the myth about not buying fuel when a delivery has just been made is not worth considering. [/quote]I'm curious about the bit about not being pumped. Surely it has to be pumped into the vehicles from the underground tanks? But the bottom line is that I've heard this advice before and I decided that the volume difference, if any, on the 50 litres or so that I'd be buying, would be almost negligible. Link to comment Share on other sites More sharing options...
AnOther Posted December 11, 2011 Share Posted December 11, 2011 The rapid pumping of bulk liquids can give rise to a static charge, not desireable with a highly volatile substance such as petrol !The rate of subsequent pumping into vehicles is much lower so not such a problem. Link to comment Share on other sites More sharing options...
John Brown Posted December 11, 2011 Share Posted December 11, 2011 Ditto what AnOther said.I meant to say for delivery into the storage tank. If you see the fuss that's made when you take a delivery of Petrol you can see its potentially very hazardous.To reinforce the risk you are shown a video of a Forecourt Fire when you take the "Authorised Person's" course for a Petroleum LicenceIt's a massive fireball within seconds Link to comment Share on other sites More sharing options...
Théière Posted December 11, 2011 Share Posted December 11, 2011 [quote user="just john "]I tried it in my Audi Estate, it took up the spare wheel well, leaving the wheel in the cargo area, and after a few years needed a replacement cylinder head, when the Insurance Co demanded a new installation certificate that was the last straw and I traded it in. Too much hassle. Then I bought a Euro IV diesel estate and learn't about the cost of DPF failures . . . I'm driving both diesel van and petrol car, still looking for an estate replacement that doesn't require LPG or DPF[/quote]As I said on the 2 stroke thread there is an aftermarket oil injector sold for LPG because of the high wear the upper cylinder and head gets without all the nasty polluting lubricants we really need to keep things running nicely.Euro 3 doesn't have DPF, well mine doesn't so I will keep that until 2020 when it will need to change again for the LEZ in the UK.Not forgetting the article about being ripped off for warm fuel does it really matter when you drive a 427ci to go and pick up your groceries [:)] if they were really bothered they would also have proper gallons not those little girlie ones they use [:P] Link to comment Share on other sites More sharing options...
idun Posted December 12, 2011 Share Posted December 12, 2011 There was one little thing that you missed in that and I cannot remember what it is called, being very non scientific et al. But I am well trained to squeeze gently and slowly as there is some advantage to doing that and as the explanation eons ago made sense, I still do it. When we lived in rural France, I ended up with a rule, treat a half full tank as empty, many reasons, strikes and just having to go some where in an emergency and if the tank is empty or low, it was not convenient. Link to comment Share on other sites More sharing options...
NickP Posted December 13, 2011 Share Posted December 13, 2011 [quote user="idun"]There was one little thing that you missed in that and I cannot remember what it is called, being very non scientific et al. But I am well trained to squeeze gently and slowly as there is some advantage to doing that and as the explanation eons ago made sense, I still do it. [/quote]As the actress said to the Bishop, stirring her tea with the other hand! [Www] [:D] Link to comment Share on other sites More sharing options...
idun Posted December 13, 2011 Share Posted December 13, 2011 bad bad NickP. Slippage is wot I had forgotten! Link to comment Share on other sites More sharing options...
Théière Posted December 13, 2011 Share Posted December 13, 2011 I am quite bad too, I was thinking along the same lines but didn't post [:$] Link to comment Share on other sites More sharing options...
idun Posted December 14, 2011 Share Posted December 14, 2011 Well what can I say, but ....................bad bad Théière!! Link to comment Share on other sites More sharing options...
woolybanana Posted December 14, 2011 Share Posted December 14, 2011 You can guess where my mind was too, Idun!![6] Link to comment Share on other sites More sharing options...
woolybanana Posted December 14, 2011 Share Posted December 14, 2011 You can guess where my mind was too, Idun!![6] Link to comment Share on other sites More sharing options...
just john Posted December 14, 2011 Author Share Posted December 14, 2011 [quote user="idun"] Well what can I say, but ....................bad bad Théière!! [/quote]I thought that since Victoria had passed on that it wasn't bad anymore, perhaps naughty [:D][quote user="woolybanana"]You can guess where my mind was too, Idun!![6][/quote]However once or twice Wooly maybe, but three times, you'll go blind[:P] Link to comment Share on other sites More sharing options...
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