fuel economizing driving technique?

[notEworthy27]

Puwede namang i-manual shift ang INVECS... pero from memory, it won't let you shift up at a very low rpm, right?

yup. actually it has to reach minimal speed at that next gear before you can shift up.

[nugundam93]

niky: true. it has a set rpm before it'll allow you to shift up. on the outlander (2.4L gas + invecs2), it'll let you upshift at usually about 2K-2.2K rpm.

i guess depende nga sa a/t yung hold function. ganun kasi for the gen2.5 a/t pajero sa hold function niya, it'll like limit your revs and shift early.

[William Tell]

I read some conflicting statements regarding shifting to neutral when driving. So which is which can it save on fuel or not?

[andre]

Putting on Neutral wont save fuel. It can be dangerous if your on a downhill drive. Cars with avg km/liter fuel computer onboard can attest to this.

[niky]

The answer is difficult to define. It really depends.

If you're travelling long distance, neutral can save some gas. If you're travelling downhill, staying in gear without pressing the gas can also save (get really good Tagaytay and Baguio mileage this way).

Staying in gear if you have an EFI car means you are using no gas at all, and the car's momentum powers your aircon, power steering (depends on car) and alternator. But it causes you to lose momentum more quickly.

Shifting into neutral means you are using a slight amount of gas to keep the car idling and powering the said accessories. But you can coast for very long distances doing this on slight downhills or level highway if your stop is coming up or you see traffic in the distance. Conserving momentum enables you to extend gas conservation.

Shifting into neutral is a valid strategy for fuel economy runs, but in the real world, it's not as safe as keeping the car in gear. Some people scoff at engine braking, saying that it will cause premature wear of the engine, and say that the brakes should be enough.

But we were taught at track school NEVER to coast in neutral in traffic NOR to downshift while braking. Just leave it in the same gear, and only press the clutch when you're nearly stopped.

[RafRaf]

... NOR to downshift while braking. Just leave it in the same gear, and only press the clutch when you're nearly stopped.

Traffic stops... your braking in gear... and you've slowed down to the min speed for the lower gear... the traffic ahead starts to move... what do you do next?

a) continue to stay in gear and accelerate
b) downshift to the lower gear directly and accelerate
c) double clutch... clutch shift to nuetral first then clutch and put in lower gear

[William Tell]

Thanks for the info!!

[niky]

Me? Depends on the speed. My car is kind of torque-y, so I can usually stay in 3rd or 4th, no matter how slow. Sometimes, I just go straight to the gear that would put me around 2k rpm.

Medyo ayaw ng kotse ko ang sobrang babang revs pag nag-e-engage ang clutch, so I try not to change if I don't have to.

[mbt]

if your car has the bottom-end torque, you can get away with not shifting at all, or shifting to a relatively tall gear like 3rd even at 20 kph or something

as long as your engine doesn't lug.

[niky]

That's the beauty of diesels (speaking of my other ride)... they never do.

[rushmore]

Nasunod ko naman halos lahat pwera lang ung lugging.. gas naman akin eh hehe..
Up dito..

[jazzinmypants]

mas ok ba magbrake when in gear or when in neutral? halimbawa medyo downhill or the traffic ahead comes to a stop.

[s10pao]

mas ok ba magbrake when in gear or when in neutral? halimbawa medyo downhill or the traffic ahead comes to a stop.

in gear para mas safe.

[jazzinmypants]

in gear para mas safe.

pero when it comes to fuel consumption, brake fluid, etc., pareho lang sila?

[Noel Salisipan]

This is fuel gain technique; make a habbit of refuelling in the morning rather in the afternoon because we buy fuel by volume & not by mass. In the morning, fuels have more mass with less volume due to thermal contraction. Unlike in the afternoon, you buy expanded volume of fuel due to thermal expansion!

It is about half liter per 20liter you have lost if you refuel in the afternoon.

[s10pao]

This is fuel gain technique; make a habbit of refuelling in the morning rather in the afternoon because we buy fuel by volume & not by mass. In the morning, fuels have more mass with less volume due to thermal contraction. Unlike in the afternoon, you buy expanded volume of fuel due to thermal expansion!

It is about half liter per 20liter you have lost if you refuel in the afternoon.

sir may specific time ba ito in the morning? how about in the evening?

[Noel Salisipan]

sir may specific time ba ito in the morning? how about in the evening?

Mostly pag nag-subside na ang init sa hapon yun na ang start, then pag medyo mataas na araw sa umaga yun nman ang cut off. Pero mas effective sa umaga kasi the whole night nag-normalize ang ambient temperature at ground temperature.
Find your time bro, between 10pm to 8am is my advice.
Importante kasi bro yung temperature difference during the whole day, dun tayo sa lowest temperature is the ideal time for refuelling.

[s10pao]

Mostly pag nag-subside na ang init sa hapon yun na ang start, then pag medyo mataas na araw sa umaga yun nman ang cut off. Pero mas effective sa umaga kasi the whole night nag-normalize ang ambient temperature at ground temperature.
Find your time bro, between 10pm to 8am is my advice.
Importante kasi bro yung temperature difference during the whole day, dun tayo sa lowest temperature is the ideal time for refuelling.

salamat sa info sir. usually kasi sa tandang sora ako nag-papagas, 1 pesos din ung difference compared dito sa makati. sinasabay ko na pag naghahatid ako, un nga usually late morning na, 9am onwards.

[Noel Salisipan]

salamat sa info sir. usually kasi sa tandang sora ako nag-papagas, 1 pesos din ung difference compared dito sa makati. sinasabay ko na pag naghahatid ako, un nga usually late morning na, 9am onwards.

Ok pa rin yun kasi meron delay ang "heat transfer" para mag expand agad ang fuel. Hwag lang 3pm lalo na pag tirik talaga ang araw, lugi ka nun sa gasolinahan

[Noel Salisipan]

Ok, happy refuelling bro kahit mahal gasolina dyan sa Manila.
Dito sa alaminos Pangasinan, 46.20 lang nung saturday.
Dyan ba sa Manila, magakano na premium gasoline?