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Scion MPG-Real World Numbers

494 messages,  Last post on Nov 26, 2009 at 1:58 AM

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What is this discussion about? Scion tC, Scion xB, Scion xA, Fuel Efficiency (MPG)

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#323 of 494 My mileage by exzur2071 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.
#324 of 494 My mileage II by exzur2071 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. Replies to this message: aatherton (Mar 21, 2007 10:22 am)
#325 of 494 Re: My mileage [Mr_Shiftright] by aatherton Mar 21, 2007 (10:09 am)
Replying to: Mr_Shiftright (Mar 20, 2007 11:47 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 494 Re: beats on SUV [ackerj] by aatherton Mar 21, 2007 (10:13 am)
Replying to: ackerj (Mar 05, 2007 7:44 pm) "... 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 494 Re: My mileage II [exzur2071] by aatherton Mar 21, 2007 (10:22 am)
Replying to: exzur2071 (Mar 21, 2007 8:47 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 494 Re: mpg [Mr_Shiftright] by aatherton Mar 21, 2007 (10:28 am)
Replying to: Mr_Shiftright (Mar 05, 2007 7:49 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.
#329 of 494 My mileage. by exzur2071 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. Replies to this message: Mr_Shiftright (Mar 22, 2007 9:05 am) dwynne (Mar 22, 2007 10:15 am) crazedcommuter (Mar 22, 2007 2:45 pm) Mr_Shiftright (Mar 22, 2007 9:38 pm)
#330 of 494 Re: My mileage. [exzur2071] by Mr_Shiftright HOST Mar 22, 2007 (9:05 am)
Replying to: exzur2071 (Mar 21, 2007 10:55 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. Replies to this message: dwynne (Mar 22, 2007 10:15 am) crazedcommuter (Mar 22, 2007 2:45 pm) Mr_Shiftright (Mar 22, 2007 9:38 pm)
#331 of 494 Re: My mileage. [Mr_Shiftright] by dwynne Mar 22, 2007 (10:15 am)
Replying to: Mr_Shiftright (Mar 22, 2007 9:05 am) If you live where winter "oxygenated" gas is mandated, maybe they switched back to "normal" gas this month?   Dennis Replies to this message: crazedcommuter (Mar 22, 2007 2:45 pm) Mr_Shiftright (Mar 22, 2007 9:38 pm)
#332 of 494 MPG Improvement by crazedcommuter Mar 22, 2007 (2:45 pm)
Replying to: dwynne (Mar 22, 2007 10:15 am) 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.

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