Downshifting Question on Hills
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I live off of a street that is a really long, big hill that is a 35 zone. When I am going up it and going like 40-43mph, I keep it in 4th gear. When I am going down it and going like 40mph, I keep it in 3rd gear which is around 3K rpm. I don't have to use the brakes much and the engine isn't spinning that high. Basically you want to just keep the engine between 2K-3K rpm for normal driving when you are trying to maintain a certain speed. And yes, there are some hills where being in a lower gear and having the engine turn at close to 3K rpm saves more gas mileage than being at a higher gear that has the engine turning at low 2K rpm because of the extra power required to keep the car going. Just use your fuel economy meter if you have navigation to find out what provides the best gas mileage.
Once you hit over 3K rpm, you are just ruining your gas mileage though. And yes, the G has the fuel cut-off just like every other car out there...when you let off the gas, the engine isn't sucking up any fuel and is just being powered by the movement of the rear wheels.
Once you hit over 3K rpm, you are just ruining your gas mileage though. And yes, the G has the fuel cut-off just like every other car out there...when you let off the gas, the engine isn't sucking up any fuel and is just being powered by the movement of the rear wheels.
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the amount of fuel being injected is depedent on the engine's ability to consume it..
that means that if you are in 6th gear going 20mph and floor it, it is NOT using a bunch of fuel.... if you get a feel for how much flooring it at 20mph does for you acceleration-wise... and then accelerate exactly that same way in 2nd gear instead (at high rpms), you will use ALMOST exactly the same fuel.
burning fuel to create power... that hurts your mileage. coasting the engine (foot off the gas) or barely accelerating at moderate revs (3k-5k) does not use more fuel than coasting in Neutral or barely accelerating at low revs.
if you have navi try watching your realtime fuel consumption display on the fuel economy screen.
higher revs are harder on your engine than low revs, but not exceedingly so unless you're talking about constantly redlining. so... up the hill... use whatever gear you want, it's about the same mileage wise.. the only difference is your ability to accelerate and how much you are beating up your engine. anything between 2-5k rpm should be acceptable in either case. going down the hill, selecting a gear that gives you rpms in that same range will save your brakes and use NO fuel.
that means that if you are in 6th gear going 20mph and floor it, it is NOT using a bunch of fuel.... if you get a feel for how much flooring it at 20mph does for you acceleration-wise... and then accelerate exactly that same way in 2nd gear instead (at high rpms), you will use ALMOST exactly the same fuel.
burning fuel to create power... that hurts your mileage. coasting the engine (foot off the gas) or barely accelerating at moderate revs (3k-5k) does not use more fuel than coasting in Neutral or barely accelerating at low revs.
if you have navi try watching your realtime fuel consumption display on the fuel economy screen.
higher revs are harder on your engine than low revs, but not exceedingly so unless you're talking about constantly redlining. so... up the hill... use whatever gear you want, it's about the same mileage wise.. the only difference is your ability to accelerate and how much you are beating up your engine. anything between 2-5k rpm should be acceptable in either case. going down the hill, selecting a gear that gives you rpms in that same range will save your brakes and use NO fuel.
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Machine Head
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Mar 16, 2016 08:55 PM
