New engine MPG

[Kitt]

So, I started to measure the MPG on my new car and the results were shocking: my 11 year Old manual Yaris had 25 MPG, the new one (automatic) 14 mpg. Both have the same 1.3 engine. I know manual transmissions lead to a lower MPG versus the automatic but not that much.

I've also heard that the car tends to consume more during break in period. Can somebody tell me if this is right?

[Rigaud]

Originally Posted by Kitt

So, I started to measure the MPG on my new car and the results were shocking: my 11 year Old manual Yaris had 25 MPG, the new one (automatic) 14 mpg. Both have the same 1.3 engine. I know manual transmissions lead to a lower MPG versus the automatic but not that much.

I've also heard that the car tends to consume more during break in period. Can somebody tell me if this is right?

Opposite.....manual is better for MPG!!!

[NYC-SE]

Both of those numbers are way low. How are you measuring MPG? Something is wrong somewhere.

[IllusionX]

City traffic only, AC on all the time. I'm not surprised by the numbers.

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[NYC-SE]

Originally Posted by IllusionX

City traffic only, AC on all the time. I'm not surprised by the numbers.

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14 MPG!!! I've driven trucks that did better than that. I drive in NYC traffic, with an auto transmission, the LOWEST tank I ever got on the Yaris was 28.8 MPG. Something is wrong with Kitt's calculations, either that or he parks the car with the engine running.

[WeeYari]

Driving with shift lever in 3 and not D? It happens.


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[nortonfb]

What is the terrain like? Mountains? Uphill both ways?
I never had less than 30mpg driving 90 mph.

[Kitt]

I set the TRIP A odometer at 0 when I fill up, then I drive until the tank is almost empty, as much as I can drive. Then I divide the odometer millage between 11 gallons and that gives me the MPG right?
In other words, I can drive my '05 with a full tank for about 270.9 miles and the '15 gives me about 158 miles with a full tank. Both with ac on, same distance, i'll say moderate traffic at an average speed of 55mph and a regular terrain.

please let me know if I am doing the math wrong or something else. I'd really appreciate it

[Kitt]

Originally Posted by Rigaud

Opposite.....manual is better for MPG!!!

correct, sorry for that

[Kitt]

Originally Posted by NYC-SE

14 MPG!!! I've driven trucks that did better than that. I drive in NYC traffic, with an auto transmission, the LOWEST tank I ever got on the Yaris was 28.8 MPG. Something is wrong with Kitt's calculations, either that or he parks the car with the engine running.

not really sure what happens, I even put it on neutral whenever I'm on a stop light or not moving the car in traffic.

Originally Posted by WeeYari

Driving with shift lever in 3 and not D? It happens.


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nope, I change it to 3 sometimes but i return it so it can shift to 4th

[IllusionX]

Originally Posted by Kitt

I set the TRIP A odometer at 0 when I fill up, then I drive until the tank is almost empty, as much as I can drive. Then I divide the odometer millage between 11 gallons and that gives me the MPG right?
In other words, I can drive my '05 with a full tank for about 270.9 miles and the '15 gives me about 158 miles with a full tank. Both with ac on, same distance, i'll say moderate traffic at an average speed of 55mph and a regular terrain.

please let me know if I am doing the math wrong or something else. I'd really appreciate it

Well, its kinda wrong. Because there is a little over a gallon in the tank when the light comes on.

I would calculate with reset trip, and drive until you fill up, and divide it with how much you filled until first click.

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[Kitt]

I'll check it that way to see if there is any difference and keep you guys posted. That would fix the low mpg values on both cars, however, the gap between both cars is still huge, regardless of the wrong initial values, keeping in mind that i am using the same method for both cars. the numbers should be close, if not the same. We are talking about 112 miles more.

I would also like to add that this is the first tank that I measure, so I have to keep tracking them to get an average.

[NYC-SE]

What does the trip computer show for MPG?

[Kalispel]

95% of my daily driving is "City Driving" (little/no severe 'traffic jam' type driving though), and my Average MPG Display indicates that I am averaging 38.x MPG. The amount of gas that I am purchasing weekly to fill back up validates those numbers.

[Kitt]

Originally Posted by NYC-SE

What does the trip computer show for MPG?

Mine does not come with a consumption display so I have to do it manually.

[NYC-SE]

Originally Posted by Kitt

Mine does not come with a consumption display so I have to do it manually.

Hmmm. I thought all new cars had one. Anyway I just realized that Panama City is not Panama City Florida but Panama City Panama in your case which got me thinking. You guys are on the metric system, correct? Kilometers on the odometer and Liters on the pump right? I'm sure there must be some mistake in your calculations, most likely converting from KPL to MPG. When you fill up next time post your mileage as KPL.

BTW 1KPL=2.352MPG

[Kitt]

We measure it as kilometers per gallon, so I do the conversion from km to miles and do the rest of the math as usual

[bgkz25]

I thought the standard measurements are either mpg (miles per imperial gallon) or kpl (km per liter). I was wrong, it's different where you're at, metric and english.

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