DON’T PUMP FULL TANK OF PETROL
I received this through email.
Many of us are not aware that the petrol kiosk pump has a return pipe-line(in black ). When the petrol tank (in the car) reaches full level, there is a mechanism to trigger off the pump latch and at the same time a return-valve is opened (at the top of the pump station) to allow excess petrol to flow back into the pump. But the return petrol has already pass through the meter, meaning you are donating the petrol back to SHELL/PETRONAS/ CALTEX/MOBIL……….
Update:
Clarification from Shell. I extend my apologies to all parties concerned for the error in this post.
When you start fueling, there’s already the balance petrol in the fuel line (black rubber hose). No matter what amount you fueled, it will always be exact. Do you think these Oil & Gas company wants to get sued for cheating? It’ll spoil their repo.
Thanks for your comment and welcome. I do read yr stuff from time to time and your comments all over the blogosphere.
The source tells me there is no balance in fuel line. If there is a balance it would be too much a fire risk and hazard. There is no element of cheating over here. It is actually a security measure to ensure no incidents happen. As a wise consumer, we can save a few sen by not filling up to full. Excess will just drain back.
an engineer told u tat?
i received it from a credible source
thanks for the tip, now we can all save a few cents!
Every sen counts nowadays
You know that is total bullshit.
Otherwise, once it detects your tank is full, and your total is say, RM84.59, you won’t be able to top it off to a round number ie RM85 like MILLIONS of people do.
And also there was once where the petrol actually spilled out because it was too full.
BULLSHIT ALERT.
Thanks for the feedback. Personally I believe what I wrte makes sense. This is a safety measure. So if for example we dont fill up a full tank and the price of petrol being so high we do save a few sen every time. Personally I use about Rm400 to Rm600 a month on petrol. it makes sense to me. I fill up about RM80.00 rather than the full tank.
I heard about this sometimes ago but I have the same thinking with Noktah Hitam.
I think most readers have misunderstood and thought I implied an element of cheating. It is not. It actually makes sense.
But still it is open to interpretation. To have a balance in the fuel line to be passed on to the next customer is from what I heard not feasible. It will auto drain back. This is a safety precaution. Otherwise fires may occur or worse an explosion. It would be a waste for a customer to pay for this unused oil. Be a wise consumer.
I know the old system still use the balance in the fuel line. You are right it is hazardous. And thats why the fuel line alone cost 400-1000. Pirelli are usually the ones supplying the fuel line. The fuel line is almost impossible to burn.
There is a meter before the fuel line. What ever amount of fuel flows through it, it will capture. So whether you have fuel in the fuel line or not, you will get the right amount of liters in your car.
But your argument can still be correct. 1st More fuel = heavier car = more petrol use (F1 theory). 2nd Petrol = Alcohol = easy to di-oxidized, when di-oxidized, lesser combustion = inefficient burning = more petrol per km (rocket theory). 3rd, full tank = no worries = happy = press accelerator harder (car junkie theory).
I received the info from a credible source. But obviously u know yr stuff. Thanks noktahhitamvery much for your clarification.
you can always test using 1.5 liter bottles though but that would make everything smelly.
But if you do clear this myth, I suggest you go sue the Oil & Gas companies. Sure millionaire
thanks for all the traffic i got from yr blog today
petrol costs are not the only cost of keeping a car. if u want to save money, why not count the cost of insurance, depreciation, maintainance, repair, road license, fines, as well as petrol and add that up and consider whether hiring a taxi when u need it, or paying friends for lifts, would not be cheaper in the long run. That way u help the local economy, ur friends would welcome ur contribution, and the taxi man is a local, and u will be directly paying him and helping him out with his livelihood. as it is , by keeping a car, u r helping the rich oil companies, the rich car makers, the rich car mechanic.
a few hrs ago Mrs BB asked me to buy a second car, a small model one for her. save on petrol
BB, i think i got that email before, reliable or not i dunno..but i’ve get used of asking the pump attendant to do FULL tank. And he will actually goyang goyang the whole car to make sure i can pump more. Maybe i should start practicing like you, pump 80 enough liao.
I read this before, I think the petrol company has made the clarification about it~ I dunno ler, keke…
I’m not sure it works this way, only because of this very un-scientific test.
I fill up a 5 gallon plastic gas can for my boat by hand, and often stop and start the flow it get it to the very top. It rarely ever shows 5 gallons was put into the can, let alone over that, which it should if this was the case.
It does suck the gas back up, but from what I can tell, you are not charged for it.
Don’t know what not … magic?
Flyfisher
Come on, he is doing a favour in pointing out a tip to all of us readers, the least you can do is thank him, right? Like me, I appreaciate every single advice I can get, so thanks for informing me!
Hmm…I’m not sure how true it is but thanks for informing us. Will experiment it. But since I only got a 2 wheel rather than 4 wheel so not that bad lor! =)
Are you sure? Any back up from researches, journal articles, books, etc? Or any prominent figures in the petrol or engineering industry? If yes, please quote the sources.
Damn! I must be spending too much time on my thesis! Time to take a break!
So it don’t just stop? It suck back some petrol? Hm… I never pump that much though, but this make me want to see more
I don’t have x-ray vision but does the tip of the nozzle touch the surface of petrol when the tank is full? If not, how does the petrol get sucked back? Also, every time my tank is full, the nozzle will stop with a loud thud. Assuming the sound indicates the valve is shut, how then does petrol from our tank flow backwards against gravity?
This is not true at all, just add it into the rumour bin
One thing i must say, malaysians are good at spreading rumours using the excuse of better safe than sorry…
dont think this is real la…
agree with zewt…
but thanks for sharing, got me thinking LOL
Yes, I have read this article many years ago….when I was much younger. Kekekeke….thanks for the reminder.
I got this little ‘news’… and my search for some legitimate answers got me to this familiar place by the longkang…(heheh). Here’s what I found: http://www.shell.com/home/content/my-en/news_and_library/hse/2005/do_not_pump_full_tank_1014.html
And here’s some more interesting info for those who may need it: http://www.straightdope.com/classics/a1_263.html
If there was fuel in the hose, you would be able to get this by squeezing the pump lever after you turn the pump machine off. If there is any fuel in the hose it would be such a small amount that you would run out of fuel before you could put the vehicle in gear. If the hose is hung up by a cord to take up the slack after you’ve pump your fuel there will probably be some in the part of the hose that leads up.