How many rpms does your FRS idle at ?

[dssence]

Originally Posted by chrisl

You've done 60km and consumed a quarter tank, or done 60km and have a quarter tank left?

I've done 60km and consumed the 1st 1/4 quarter tank . So that would equal to around 12.5 litres even more for that 60km I've done.
Tank it's 50litres, if you divide 50/4 , each quarter gives around 12.5 liter.
with this average I would be doing around 250km for the whole tank fill up. But I think it might have to do with the idling at 800rpm. It's way high

[ntron1]

Here we go again with calculating fuel economy with the old divide the gauge into 4 equal parts..... You should wait until you have 10,000 km before even thinking about measuring fuel economy.

[chrisl]

Originally Posted by dssence

I've done 60km and consumed the 1st 1/4 quarter tank . So that would equal to around 12.5 litres even more for that 60km I've done.
Tank it's 50litres, if you divide 50/4 , each quarter gives around 12.5 liter.
with this average I would be doing around 250km for the whole tank fill up. But I think it might have to do with the idling at 800rpm. It's way high

Idling at 800rpm wouldn't cause a dramatic difference in gas consumption (and besides, you shouldn't be idling through a significant portion of the tank anyways - that'll wreck your gas mileage no matter what speed your idle is). As for your calculations, gas gauges are almost never accurate enough to do that sort of calculation - the only reliable way to get fuel mileage is to look at how much gas you put in when you fill it up, and then divide the actual distance traveled since the last fuelup from the odometer by how much gas you put in.


Secondly, how are you driving? Is it primarily city driving? Highway? What speed? What RPM range are you keeping the car in? How long is your average trip (from starting the car to turning it off again)? All of these factors can dramatically affect gas mileage.

[dssence]

Originally Posted by ntron1

Here we go again with calculating fuel economy with the old divide the gauge into 4 equal parts..... You should wait until you have 10,000 km before even thinking about measuring fuel economy.

Why wait ? Again this is the sort of discussion about the car having to break up to a certain amout of kilometers?.
This is not rocket science, obviously each quarter it's not measured precisely on the fuel meter. But it's giving an approxiamte measurement of each quarter could be 12.5 liters name it 13.5 not more than that.
So my calculation it's not far from reality and far from being practical it's what's happening for real. And reality is saying i''ve done only 60km with just 1/4 tank want it or not.
Tell you more.. on my first tank I reached to the last quarter of the tank , and have only done 140 km don't know what else you want me to do, reach up to the point where the low fuel led starts blinking and there tell you how many km i've done, just to sound more logical?. No thanks.

[ZionsWrath]

Originally Posted by dssence

I've done 60km and consumed the 1st 1/4 quarter tank . So that would equal to around 12.5 litres even more for that 60km I've done.
Tank it's 50litres, if you divide 50/4 , each quarter gives around 12.5 liter.
with this average I would be doing around 250km for the whole tank fill up. But I think it might have to do with the idling at 800rpm. It's way high

If you think the idle is affecting your mileage you must be spending a lot of time in city/standstill traffic. In which case, regardless of idle RPM, you would be consuming a lot more fuel. I make between 200-250 MILES with 90% or more highway driving and having a heavy foot. I'm not disappointed.

[ntron1]

Dessence,

Good luck to you. I just can't take it anymore.

[chrisl]

Originally Posted by dssence

Why wait ? Again this is the sort of discussion about the car having to break up to a certain amout of kilometers?.
This is not rocket science, obviously each quarter it's not measured precisely on the fuel meter. But it's giving an approxiamte measurement of each quarter could be 12.5 liters name it 13.5 not more than that.
So my calculation it's not far from reality and far from being practical it's what's happening for real. And reality is saying i''ve done only 60km with just 1/4 tank want it or not.
Tell you more.. on my first tank I reached to the last quarter of the tank , and have only done 140 km don't know what else you want me to do, reach up to the point where the low fuel led starts blinking and there tell you how many km i've done, just to sound more logical?. No thanks.

Or it could be 8 liters, or it could be 14. I've never found car fuel gauges to be terribly accurate, especially in the upper half of the travel.

As for what you should do? No, you don't have to go until it starts blinking, but you should base your fuel usage on how much fuel it takes to top off the tank, not how much you think is gone based on the gas gauge.

Finally, 140km down to the bottom quarter is really bad, but it is possible depending on driving style. As I asked above, how are you driving?

[dssence]

Originally Posted by chrisl

Idling at 800rpm wouldn't cause a dramatic difference in gas consumption (and besides, you shouldn't be idling through a significant portion of the tank anyways - that'll wreck your gas mileage no matter what speed your idle is). As for your calculations, gas gauges are almost never accurate enough to do that sort of calculation - the only reliable way to get fuel mileage is to look at how much gas you put in when you fill it up, and then divide the actual distance traveled since the last fuelup from the odometer by how much gas you put in.


Secondly, how are you driving? Is it primarily city driving? Highway? What speed? What RPM range are you keeping the car in? How long is your average trip (from starting the car to turning it off again)? All of these factors can dramaticlly affect gas mileage.

Great there you , I wanted to tell you this.
On my second tank fill up, I've put 32liters with the last quarter tank left. And guess what's I've done 140km.

How am I driving ? Well I'm driving like a grandpa, trying to be as gentle as possible on 1st and 2nd gear. To see if this thing give me a good efficiency. Shifting less than 3k for 4th , 5th.

I never go past 3k rpms.

So many thanks

[dssence]

Originally Posted by ZionsWrath

If you think the idle is affecting your mileage you must be spending a lot of time in city/standstill traffic. In which case, regardless of idle RPM, you would be consuming a lot more fuel. I make between 200-250 MILES with 90% or more highway driving and having a heavy foot. I'm not disappointed.

Well yeap I'm doing City driving not highway or commute. But anyways like I said before my old celica liftback GT from 1979 seems , let me correcy myself is more efficient than this new car.

[dssence]

Originally Posted by chrisl

Or it could be 8 liters, or it could be 14. I've never found car fuel gauges to be terribly accurate, especially in the upper half of the travel.

As for what you should do? No, you don't have to go until it starts blinking, but you should base your fuel usage on how much fuel it takes to top off the tank, not how much you think is gone based on the gas gauge.

Finally, 140km down to the bottom quarter is really bad, but it is possible depending on driving style. As I asked above, how are you driving?

Exactly you just said it. I've done 140km when I did my 2nd fill up with the last quarter left. putting exactly 32 litres of fuel. That I can tell you for real.
I'm driving calm, shifting always below 3k . Shortest 1st and 2nd gear possible

[jvincent]

Originally Posted by dssence

Tell you more.. on my first tank I reached to the last quarter of the tank , and have only done 140 km don't know what else you want me to do, reach up to the point where the low fuel led starts blinking and there tell you how many km i've done, just to sound more logical?. No thanks.

You still haven't answered the questions about what type of driving you are doing.

If you are in stop and go city traffic all day your mileage will suck.

So once again, please describe your driving conditions.

Sent from my Nexus 5 using Tapatalk

[dssence]

Originally Posted by jvincent

You still haven't answered the questions about what type of driving you are doing.

If you are in stop and go city traffic all day your mileage will suck.

So once again, please describe your driving conditions.

Sent from my Nexus 5 using Tapatalk

Yep it's pretty much city driving. Stop and go mostly. but it's not like I'm stopping and go .. over and over. but yes it's city wise. But even if I'm city stop and go can it put down the fuel efficiency so much. IT could be adding to the fact my idle it's a bit high and i'm stopping and leaving in neutral that car. that might even add up a bit more to consuming fuel more. shouldn't be like that.. if we think new cars should be more efficient ad they use injectors and ports Versus my old ancient celica liftback 1979 year which uses a carburator it's also 4 cilinder, and I do the same stop and go routine.

[jvincent]

Originally Posted by dssence

Yep it's pretty much city driving. Stop and go mostly. but it's not like I'm stopping and go .. over and over. but yes it's city wise. But even if I'm city stop and go can it put down the fuel efficiency so much. IT could be adding to the fact my idle it's a bit high and i'm stopping and leaving in neutral that car. that might even add up a bit more to consuming fuel more. shouldn't be like that..

800 RPM idle is not your problem. Have you tried taking the car out for a long highway drive to see what mileage you get there?

If you are in city traffic all day you are going to get terrible mileage, plain and simple.

If the highway mileage is bad then there may be an actual problem with the car.

Sent from my Nexus 5 using Tapatalk

[dssence]

Originally Posted by jvincent

800 RPM idle is not your problem. Have you tried taking the car out for a long highway drive to see what mileage you get there?

If you are in city traffic all day you are going to get terrible mileage, plain and simple.

If the highway mileage is bad then there may be an actual problem with the car.

Sent from my Nexus 5 using Tapatalk

Hi thanks so much vincent. No I haven't done any highway. Should I ? like how many km driving on highway ? as to check