Last post on Jul 11, 2013 at 3:32 PM
You are in the Scion xA and xD
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Scion tC, Scion xB, Scion xA, Fuel Efficiency (MPG)
Mar 21, 2007 (8:22 am)
I traded in my 2005 Scion tc 5 spd for a 2007 VW Rabbit 6 spd in October last year.
On the window sticker of the tc I used to have, the city and hwy mpg are 23 and 29 respectively. I was surprised to average 34 mpg in both city and hwy driving. Probably because I had done a lot of driving coasting in neutral. What I notice then, was driving off-throttle in gear has a higher rpm than coasting in neutral. The higher the rpm, the more is the gas consumption.
Mar 21, 2007 (8:47 am)
Downhill, while driving off-throttle in gear, the mph goes higher and rpm gets lower if I switch the gear to neutral.
Driving at a higher speed with the least rpm gets the very best mpg.
#325 of 508 Re: My mileage [Mr_Shiftright]
Mar 21, 2007 (10:09 am)
"... when coasting in neutral you are just going further on the same amount of fuel as you would use while off-throttle in gear."
At 660 RPM idle, the engine uses the same amount of fuel whether stopped at a light or coasting at 50 mph in neutral.
At 50 mph, coasting in neutral at 660 RPM saves fuel compared to coasting in 5th gear at 2500 RPM. That is because when coasting at 50 mph in 5th, the engine will brake the car until the RPMs fall to idle speed. When coasting at 50 mph in neutral, the only thing braking the car is air and rolling resistance.
#326 of 508 Re: beats on SUV [ackerj]
Mar 21, 2007 (10:13 am)
"... gas has one additive that dont burn: "water". So what your pumping is not all gas. Watch the car in front of you and see the water dripping from the exhaust pipe."
That water did not come from the pump. It is condensation made in the muffler. Vehicles with large mufflers used in the winter for short trips will accumulate the most condensation. Water dripping from the exhaust pipe is rarely seen in the summer.
#327 of 508 Re: My mileage II [exzur2071]
Mar 21, 2007 (10:22 am)
"... Driving at a higher speed with the least rpm gets the very best mpg."
The very best mpg is obtained by driving with the least throttle, the least rpm, and the slowest and steadiest speed that conditions allow.
I my 5-speed xB I have gotten 42 mpg on two Interstate tanks by doing that. Each trip was 250 miles at a steady 60 mph with no stops.
On two other trips of the same length using the same rules, I got 37 mpg. But those trips were on 2-lane roads with hills and curves, and passing through many small towns. Cruising speed was held around 55 mph, and of course there were gear changes and stops.
#328 of 508 Re: mpg [Mr_Shiftright]
Mar 21, 2007 (10:28 am)
"... 35 MPG: That's good! You must have a fairly light foot or flat terrain? Or you just got a really good one!"
It is the combination of a light foot, good driving conditions, and using the least rpms and speed that conditions allow. I shift around 2000 rpm, and do not have to drive in either heavy stop and go traffic or on Interstate commutes. I match my speed to the slower part of the traffic around me.
Fast driving, aggressive driving, showing off what the car can do -- the few times I have done that the mpg has gone below 30.
Mar 21, 2007 (10:55 am)
"The very best mpg is obtained by driving with the least throttle, the least rpm, and the slowest and steadiest speed that conditions allow."
The faster you can move the car with the least rpm(foot off the gas pedal, gear in neutral) squeezes the most mpg.
#330 of 508 Re: My mileage. [exzur2071]
by MrShift@Edmunds HOST
Mar 22, 2007 (9:05 am)
My mileage is getting better lately. Not sure if it's the gas or that the car is just "maturing". It has 22,500 miles on it now and seems to run better than ever.
#331 of 508 Re: My mileage. [Mr_Shiftright]
Mar 22, 2007 (10:15 am)
If you live where winter "oxygenated" gas is mandated, maybe they switched back to "normal" gas this month?
Mar 22, 2007 (2:45 pm)
I too have noticed a difference this week and I'm relieved. I don't know if it's the "normal" gas or the warm weather in the Mid-Atlantic region, but my MPG is back to what is was last Fall. 324 miles on 9.8 gal. = 33.06 mpg for the '05 TCM auto. The "box" seems to have better response also. I think that I'll swap the winter snows off this weekend for the Falkens.