Amount of fuel in tank

[squala]

Which is better? I'll point out the drawbacks of both.

More Fuel
- more weight, which means slower acceleration and less efficiency (on fuel, brakes, tires, etc.)

Less Fuel
- Fuel pump works harder (I think).
- More contaminants enter the system.
- The thing about free air volume (less is said to better).

Having said that, perhaps the best thing to do is to keep the tank between 3/4 and 1/4 full. Any other insights are welcome.

[mbt]

any performance benefits to having less fuel in the tank (due to reduced weight, and which would probably be not-too-significant anyway) will be offset by the inconvenience of having to fill up more often hehe :D at least for me

[1D4LV]

i really don't think having it always below half full is really harmful to the fuel pump. ang masama is yung parati kang natutuyuan and nauubusan.

i would go for mbt's reason... the inconvenience of having to fill up everytime you need to is the main reason.

[orly_andico]

not to mention... 55 liters of gas (full tank) is only 55 kilos at most (but gasoline is less dense than water, so it's less than 55 kilos). versus say 1000 kilos for the net vehicle weight. 5% increase lang ng full tank vs. empty tank.

[squala]

If I can remember from my science classes, water has zero density.

As for the 5% weight increase, that's a lot even if it sounds too little. Even just 1 hp is a lot (think aircons).

Perhaps we just have to maintain some sort of Goldilocks amount of fuel on-board, not too full or too empty, just right.

[pixelparadigm]

How about not less than 1/4 and not greater than 3/4 tankful of fuel?

Most of the time I just keep it between 1/2 and 1/4 full. I just fill my tank full when it's cold.

[squala]

You should be doing fine there, but the first one will lessen your visits to the station. ;)

[jnqlz]

the best is to keep your tank enough load of gasoline...........for traffic n fun

[mbt]

density of pure water is approximately 1.0 g/cc, not zero hehe :D

[geebunny]

For me, full tank to the brim then wait till the gas indicator lights up then full tank again. But I make it sure that the next gas station is less than 40 kms. away para hindi matuyuan.

[geode]

i rarely let my indicator go below 1/4. pag 1/4 na nagpapafulltank na ko. saktong 1wk un sakin.

[airshaq20]

Well...assuming a full tank of fuel is 50Liters. Quarter tank is 12.5L, thats approximately 12.5Kgs or about 27.5 lbs. If you are overweight, why not just lose some weight and put a full tank every time? That way, you are healthier, will look better and you wont have to worry about these things? heheheh

[squala]

Not ideally applicable to big-boned people.

[ravelcop]

this is a good thread.

guys, can I get a confirmation from you that maintaining your fuel tank at below 1/4 full would have a less efficient fuel consumption compared to above 1/4 full? Coz I noticed that parang mas malakas ang consumption on that setting (below 1/4 full) compared to maintaining a fulltank.

[rsnald]

eto isang thinking ng kasama ko sa opisina; pag full tank ka, there's no vapor space sa loob ng fuel tank so walang chance na magevaporate ang fuel mo (gasoline is very very volatile). pag near empty ka na, say 1/4 tank, malaki vapor space sa loob ng tangke, so more chance for the gasoline to evaporate, hence mas malakas ang tsansa that you might loose some of your fuel due to evaporation. Not really sure how much of the fuel you would loose via evaporation since selyado nanam supposed to be yun tangke at wala syang vent, but it's a fairly logical assumption.