is it better to pump petrol when the tank is half full or near empty?
reason given is:
-if half full then pump petrol, the amount of petrol changing into gas and lost is minimise but then the car is heavier and use more petrol

pls give ur comment. tq

This post has been edited by kei18kun: Mar 4 2009, 07:50 PM

what is the difference between half full and half empty?
I normally pump when the meter shows F (finish)

This post has been edited by leanman: Mar 4 2009, 07:47 PM

when is 2nd last bar

nah..not much different.....full tank make the car abit heavier...but pickup u wont notice......just fill up full tank and enjoy ur driving and fewer trips to petrol station......i

when i feel like eating ice cream i pump... n when i pump i pump till full lor

i think not too much different?!
mayb at nite preferred?

whether u pump half full or near empty, the amount of petrol evaporation will still be the same isnt it?
Just the matter of doing it once for whole tank, or twice for half tank and half tank

About the car heavier, yes it will be heavier but dude....u are not F1 racer, slight weight doesnt even do much for u...

If not mistaken.
At nite is the best time to pump.
That what my brother always do.
Pump at nite less evaporation.
Why..
Less escape through the hole for gas.
Like water in a bottle.
More Evaporation faster escape.
Less Evaporation slow escape of gas.

Please do correct me.

some myth..

pump at nite to reduce gas evaporation
but according to some.. the land surrounding the tank is still hot (even it is night already).. so no difference.

i suggest pump during the day (early in the morning)..
coz.. according to my myth.. the land surrounding the tank is still cold.. so the gas will less evaporate to the thin air.

Dun wait till light come out only pump.. You will indirectly spoilt your Fuel Meter Sensor.. Just pump whenever you are free...

Yeah early in the morning before sunrise.
Before sunrise is the coldest point of the day.

Is tat true?? I always wait til light come out only pump wo, sometimes come out i also havent pump...still drive more 50km++. but after pump, found tat inside still got 10 litre petrol left.

Go Genting Highland pump lor...
The Esso there... fuel should be at the maximum density.

Yup....it is true.. It might not spoilt if you do that for short term, but for long term it will.. If ur sensor spoilt d, fuel wanna empty already also the light wont come on anymore.. Its better to be safe and sorry.

sure ar your car meter shows F for finish
i thought have F=full and E=empty

hahaha spot on!

not true, been doing that for 13years and my fuel indicator still functioning as usual
everything is subjected to wear and tear.. even the best silicon wiper cant last u a lifetime

tumpang thread, as u know the gas pump handle has a speed selector, whether to pump it fast or slow.

why since day one when i bought my satria neo, i cannot pump in the fastest speed? & the handle will jump as in stopped automatically.

the only solution is to pump it in a slower speed.

why like that? is it too much gas vapour in the tank that causes it?

I though E is for Enough? enough to go to petrol pump, if E = empty your cannot more already.

Ok this is what I heard but can't confirm but makes sense to me:

1. Pump early in the morning because the gas is the coldest at that time. In the evening heat is still retained in the concrete thus pumping fuel late evening is still warmer then morning. In science molecules contract when its colder. Following that priciple you should get more bang for your buck when you pump in the morning.

2. The petrol tanks are also refilled in the evening and will stir up the petrol and moving the sediments, If you are pumping at that or after that time the sediments might be pumped into your car.

3. Pumping at lower speeds might take longer but there will be less evaporation. Its like washing your car when you on more water, more spray will be created especially when you hit the car.

4. Pumping half tank is better because there will be a point that the fuel can't evaporate due to saturation in the. Larger empty portion = more evaporated gas. Also its no fun when your tank shows empty and you are not near a station. Heh.

5. Safer to also pump in the morning as more people and robbers are less like to rob then.

try tank always in FULL..

last week .. heavy rain morning . . stuck in jam 3 hours ..

last 2 day .. heavy rain after work .. stuck in jam another 3 hours ..

luckly those 2 day tank is FULL ...

so .. don care when to pump .. just pump it when u feel need to...

This post has been edited by kayap00: Mar 5 2009, 10:20 AM

yeah. E for enough. but i dont remember how many km ur car can go with the E status.

Damn you're funny. But you're right. F=finish. E=enough.

yeap yeap, i pump in the morning too.

haha, good wan, but no petrol station around, will do it on weekends for me

lol..agreed....we never know whats gonna happen later on, sometimes terrible jam if ur car left 1bar and jam for 3hours....

i pump during morning or night only afternoon feel the fuel finishing so fast

lol, taken from the singapore movie "liang po po"

that is what the sensor build for ..
if you it never light up .. u lagi worry ... haha ..
after 5 years .. petrol empty d .. the sensor was never working how ? haha

Hmm .. in my opinion, normally I will make sure if possible go for full tank and to my surprise it can last longer rather than pumping half or quarter fill of the tank only.
But so far .. it works for my side here.

Cheers ~

correct also, need to test my light up

the only thing is if u pump full some of the petrol will be sent back to petrol station
just near full should be ok, my opinion lah

i pump when i got money...
No money no pump.

i feel this way too..pumping full tank feel like it can last longer..

When you feel need to, then pump. For city folks, pump at half tank is the safest, in case of traffic jam.

What's the best time to pump? Dawn will be, because ground temperature is cold, hence you'll pump more petrol. And remember to adjust to slow mode.

I pump according to mileage, why? Because my fuel meter is no longer working. lulz!

I agree with you.
but i wonder the difference significant enough? Has anyone pumped at dawn and in hot-afternoon and accurately measure the differences?

when it's empty just pump it, don't care whether it's in the morning or night. half tank or empty tank.....

just pump it & rempit...........

xD i guess u will not let anyone sit in ur car, bcoz human are heavy. take off ur 3 seats. and it will be much lighter! use carbon fiber hood. carbon fiber exhaust. like that sure very light alrdy i think o.o good luck and dont eat too much oily food, will make ur car heavier!~

I'm not really sure, bro. There's nothing for us to measure, really.

IMO, it's better to pump early in the morning when the temperature is much cooler ~ I always pump during that early hour ~

However, if tak sempat to wait better go and pump first anytime of the day as needed~

When to pump petrol?

i usually pump petrol once i see the petrol indicator already blinking...

i definitely need to pump petrol once the car cannot start already due to no petrol left

XD

"A difference of 15-degrees Fahrenheit, about 8 degrees celcius, will result in 1% difference in volume".

http://blogs.consumerreports.org/cars/2008...-pump-myth.html

Pump in RM50, save RM0.50, spend more in petrol to drive up to fill up in the morning.

The difference would be rather minimal so I just pump whenever the warning indicator comes up.

yeah...i also pump whenever feel so...light left 1 bar...or light on.....

the fuel sensor is on , whether it is empty or not empty .
when it is lower than the certain amonut , it will triggle the warning light only .

---

Added on March 17, 2009, 3:15 amthe amount differ will be so minimal until u wont notice it ler .
it fact , if u want to save money , lighten ur right foot . that is more effective .

This post has been edited by BridgestoneRE711: Mar 17 2009, 03:15 AM

pump when u don hav fuel
n don ever doubt yr fuel gauge when low
i had nightmare wif it b4 -.-

i remembered u pushed the car

din push but visited shell twice -.-

i pump when near to empty... then pump at night.. sure got a lot of fuel!

haha, i just add some fuel additives to add more mileage

I pump at morning normally,when the light blink,I will go drive another 80km then only go petrol station ~ I go petrol station only 2 times in 1 month

hahaha yesterday i forgot to switch to ngv, using petrol.. so near traffic light mydin usj subang my car's engine die..

luckly there lot petrol station nearby and i fill up rm5 petrol at bottle at shell and manually put it at my tank.. after that i start engine back and topup rm50 petrol...

half of the 1/4 tank later than that confirm will mati engine due 2 lack of energy lolz

This post has been edited by skylinegtr34rule4life: Mar 27 2009, 03:39 PM

u mean those pills? can be found at Jusco or Giant?

i wonder it works or not

wow, quite good leh, can use 2 weeks for 1 time pump, u rarely use ur car
even pump full i need to pump once every week

only at 7-11 n cosway
the product have RM1 million insurance, dunno true or not lah
so far im comfortable with it since can see the effect

This post has been edited by kei18kun: Mar 28 2009, 11:31 AM

but my car don't have RM1 million insurance wor... later bang! engine rosak in front of 7-11

Ok lo ... full tank can run 680km ~ everyday also using for work and go home and sometime midnight go eat supper or go cybercafe play game lo ....where got rarely use car

That's the thing....some people really semangat fill petrol early in the morning/late at night just to gain a few little sips of petrol

at least in front of 7-11 , can pinjam phone and call tow truck .lol

Feng Tau pills for petrol. LMFAO.

Afternoon, night or morning or half tank or whatever, the theory is similar you order a cup of hot milo, then you think the Milo is too hot causing it evaporate which you had lesser Milo in micro-litres

It is insignficantly. Just pump whenever you pass by the petrol station when your tank is lesser than half or low.

Purposely drive out to pump during morning or night time will cause you more petrol.

Did all notice whenever we pump, after the pump stop, there still would be a drop or two in the nozzle? Do you pick it up or use the straw to suck it up so that you get more petrol? <-- it could be the same theory/amount with you are getting more during night or morning. No offence.

It is insignificant, better spend those effort, time or resources concentrate on other things else like better planning on your route, servicing your car (like make sure tyre pressure is ideal for fuel efficiency), don't drive reckless like pick up then suddenly stop sharply instead slowly drive during traffic jam etc will save much much more than trying to get more petrol to pump at night or morning time.

Just my 2 cents.

ya ya! pinjam the church van & use

lots of good comments, keep it up

Cosway huh?
The fuel additive that you are using is it Automax Nanotech??

put pills in the car for what , i dont get it .
it is more worth if you lighten your right foot. as a matter of fact, if addictive were to create so much power . why esso shell etc thought of that too ?