| deanking |
Wanted to know if I am the only one.
On the first few tankfuls I was getting around 16.5 mpg. This was in the summer with the AC on. As fall set in and it got around 1500 miles on it, my mileage started dropping. Now in the cold, with 3000k miles on it, I am getting 15.5.
I thought mileage was supposed to go up as the engine breaks in. Have others experienced this? What could it be? |
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| LionSpeed |
I did experience the same mpg output at 3K range (16.5-17). Right after the 1st oil change (Mobil 1 at 5K), milage has increased noticably despite the fact that my right foot got heavier since. :rolleyes:
Currently, 18.5 average at 7K miles & loving it!
Regards,
Lion
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| deanking |
| I wonder why an oil change would make the difference? One possibility is that they reset the computer. I should probably mention this to my dealer at my first oil change. |
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| LionSpeed |
quote:
Originally posted by deanking
I wonder why an oil change would make the difference? One possibility is that they reset the computer.
In this case, "THEY" actually is me, resetting the computer. :2: |
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| HuMan321 |
Some areas of the country use a different mix in the winter such as oxygenated (?) fuel etc. This will affect gas mileage on every vehicle that uses it.
quote:
Originally posted by deanking
Wanted to know if I am the only one.
On the first few tankfuls I was getting around 16.5 mpg. This was in the summer with the AC on. As fall set in and it got around 1500 miles on it, my mileage started dropping. Now in the cold, with 3000k miles on it, I am getting 15.5.
I thought mileage was supposed to go up as the engine breaks in. Have others experienced this? What could it be?
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| deanking |
| My area uses oxygenated fuel. In fact, I have to pay 5 cents more a gallon for the privelage. I have never seen a difference in my other cars, but I don't think they have had such a tweaked engine either. |
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| LionSpeed |
Winter grade gasoline
Here in America, many states require gas stations to sell oxygenated, reformulated, or blended gasoline during the colder months of the year. These types of gasoline often contain ethanol or butane, and this diluted gasoline will typically lower your fuel economy by one to three percent due to its lower energy content. Gasoline sold in warmer months has a higher energy content which results in better gas mileage.
Oxygenated gas = less mpg. |
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| theOldMan |
If you are seeing decreased gas mileage in the winter months, the following could be causing the problems:
1) Tire pressures are low. On a recent morning my MDX was reporting low tire pressure because of the cold. The pressure had dropped from 32psi to about 26psi. After the MDX had been driven for about 20 minutes, tire pressure was back to normal. If you leave your car outside, the decrease in tire pressure will result in the loss of mpg.
2) If the car is outside on a cold morning, when you start it, the car will consume more gas until it is warmed up.
3) Warming up a car for even 10 mnutes on a cold morning will burn fuel that will decreas mpg.
4) The entire drivetrain has more friction when the car is cold. Once it is warmed up it is back to normal.
I was able to increase by mpg (2.5mpg) by increasing the tire pressure and keeping it in a heated garage. Now Montreal is colder than Philli, but the same rules apply. |
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| laborlitigator |
Gotta keep the tires at the proper pressure. Makes a big difference.
Warming up will definitely decrease the mileage.
I'd suggest after you warm up the car then reset the meter to determine your real mpg. |
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