MPG Question
#1
09-24-2008, 03:54 PM
#3
09-24-2008, 10:09 PM
Senior Member
#5
09-25-2008, 12:06 AM
RE: MPG Question
MPG depends on several factors.
Air pressure in tires. Make sure your tires have the correct air pressure. Measure when cold, and use the higher values for best fuel economy.
Manual versus Automatic. A manual transmission will get better economy...for knowledgable drivers, than an automatic.
Driving habits. This is the big one. Lead foot drivers will get worse fuel economy than those that gently accelerate and keep their speeds down.
In my case....I've got 18 mpg being a lead foot driver, and 26 mpg being a gentle driver. And I can get 30mpg on the highway.
3.0 manual transmission. How? Do you ask?
I clear the computer and do my driving habits to maximize fuel economy. Coasting down hill, using the highest gear possible. I use first gear to only get the car moving, and almost immediately shift to 2nd gear, I barely get that up to 2000 rpms before shifting to 3rd gear. I'll take 3rd gear to 2200 rpms and switch to 4th gear (it helps to not bog the engine down with steep grades uphill in these circumstances). I'll take 4th gear up to about 2500 rpms at most before switching to 5th gear.
Urban highways I don't travel faster than about 60 mph. BTW, you can get better fuel economy with manual acceleration and monitoring of speed than you can get with cruise control. But you have to make use of physics to do it. Going down a grade and beginning to go up another, begin to accelerate past your designated target speed before you get all the way down, and stop accelerating past the target speed before you get to the top of the grade. Let your momentum bring you back down to your targeted speed.
Air pressure in tires. Make sure your tires have the correct air pressure. Measure when cold, and use the higher values for best fuel economy.
Manual versus Automatic. A manual transmission will get better economy...for knowledgable drivers, than an automatic.
Driving habits. This is the big one. Lead foot drivers will get worse fuel economy than those that gently accelerate and keep their speeds down.
In my case....I've got 18 mpg being a lead foot driver, and 26 mpg being a gentle driver. And I can get 30mpg on the highway.
3.0 manual transmission. How? Do you ask?
I clear the computer and do my driving habits to maximize fuel economy. Coasting down hill, using the highest gear possible. I use first gear to only get the car moving, and almost immediately shift to 2nd gear, I barely get that up to 2000 rpms before shifting to 3rd gear. I'll take 3rd gear to 2200 rpms and switch to 4th gear (it helps to not bog the engine down with steep grades uphill in these circumstances). I'll take 4th gear up to about 2500 rpms at most before switching to 5th gear.
Urban highways I don't travel faster than about 60 mph. BTW, you can get better fuel economy with manual acceleration and monitoring of speed than you can get with cruise control. But you have to make use of physics to do it. Going down a grade and beginning to go up another, begin to accelerate past your designated target speed before you get all the way down, and stop accelerating past the target speed before you get to the top of the grade. Let your momentum bring you back down to your targeted speed.
#7
09-28-2008, 08:23 AM
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#8
09-28-2008, 10:39 PM
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RE: MPG Question
Speaking of MPG. I was surprised that my after market wheels and tires 225 x 40 x 18 with 18 x 8.5 custom wheels on makes better miles per gallon compared to my stock 16 inches wiTh 205 x 60 x 16 wheels. Been monitoring my gas mileage for the last few months and I get a good 20.3 mpg on street and 21.5 miles per gallon on freeways on the custom after market wheels.a few weeks ago, I got a flat tire so I have to replace all wheels with the stock wheels and tires and my MPG dropped tp 19.8 street and 20.3 on freeways.
Does anyone had experienced this with thier xtype 3.9, Is it maybe my computer is confused for the aftermarkedt wheels are a little bigger in diameter compared to the stock.or maybe my after market wheels are lighter maybe?
[IMG]local://upfiles/4346/AE148A5C62084BD189F3E86AFB3C9CBE.jpg[/IMG]
Does anyone had experienced this with thier xtype 3.9, Is it maybe my computer is confused for the aftermarkedt wheels are a little bigger in diameter compared to the stock.or maybe my after market wheels are lighter maybe?
[IMG]local://upfiles/4346/AE148A5C62084BD189F3E86AFB3C9CBE.jpg[/IMG]
#9
09-29-2008, 01:40 PM
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Posts: n/a
RE: MPG Question
Dont rely on your trip computer for accurate mileage. My car displays much better mileage that what is actually happening.
I suggest that if you are going to post your mileage, you need to reset the odometer, and mark down the acutal miles and actual gallons and then do the math.
On top of that, Americans use US gallons, in the UK and Canada we speak of Imperial gallons, but we actually buy fuel in litres. An imperial gallon is much bigger than a US gallon.
Anyone in UK or Canada had better do the calculation properly. I dont even know what size gallon the trip computer in my Canadian car uses?
My computer typically says that I use 10-10.5 litres per 100 km on a long highway trip, but in reality the car drinks closer to 11-11.5 It lies to make the car look better than it is.
I suggest that if you are going to post your mileage, you need to reset the odometer, and mark down the acutal miles and actual gallons and then do the math.
On top of that, Americans use US gallons, in the UK and Canada we speak of Imperial gallons, but we actually buy fuel in litres. An imperial gallon is much bigger than a US gallon.
Anyone in UK or Canada had better do the calculation properly. I dont even know what size gallon the trip computer in my Canadian car uses?
My computer typically says that I use 10-10.5 litres per 100 km on a long highway trip, but in reality the car drinks closer to 11-11.5 It lies to make the car look better than it is.
#10
09-29-2008, 02:28 PM
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