Prius (2004-09) :: 10% Reduction In Rolling Resistance - MPG Increase
Dec 2, 2011
How much fuel consumption would decrease (MPG increase) for a 10% reduction in tire rolling resistance?
My thinking is that if you're not doing much freeway mileage then the rolling resistance and air resistance are probably about equal contributions. So in a kind of oversimplified calculation I guess that a 10% RR reduction could give up to a 5% reduction in fuel consumption? Sounds like a bit of a over-estimate.
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Eventually, I'd like to replace the steel wheels on my Corolla LE (P195 65 R15) with ultra light wheels and low rolling resistance tires.
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What kind of mpg increase one would see if they were to increase the tire pressures from recommended (35 F/33 R psi) to max (44 F/ 42 R). Any stats of tracked?
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2004 Prius and I have lots of static in the AM radio. Some days it is worse than others mostly I am unable to listen to it. If the car is in accessory, the static in the AM radio is not there. As I drive the car the static will increase or decrease based on the proximity to the overhead wires. There are days however where the static will be hardly noticeable. I've owned the car since 2006 and have always had this issue.
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I have recently noticed that the ODO meter of the car does not work i.e. it is stuck at the reading (57735 km) it was on when I got the car and does not record/show the increase in mileage. the trip A and B are working perfectly fine. I took the car to the local Toyota dealer but he has no clue what is wrong with it, the guy there suggested that ECU is working fine but the ODO meter is damaged and needs replacement.
I am not sure what the guy at the dealership suggested is correct because what i think is that if ODO gets damaged then the whole speedo meter should mal function.
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I have a 2008 Prius basic model bought second hand. There are two issues since I have bought the car; first it will roll back or forward when the brake applied, this happens on any uphill or downhill. I brought the car to Toyota service centre, they did a brake test, the test passed. but this doesn't resolve this issue. It just very weird. during driving, all brake works ok, but parking the car, if not in even service, it starts to roll.
Second, recently I hear there's a crack sound when apply the brake during low speed, especially during the stop/start traffic, and I notice mostly happens when the electrical motor in running. So when brake, the crack, like the spark comes from somewhere like battery. While brake to slow down from high speed, seems no sound. So I suspect it was from the battery or electric motor.
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Driving in the snow with the low resistance tires. Not necessarily on the Prius C, but any Prius as I assume they all had the tires. I've had nothing but great success with my C.
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I was waiting for my son to come out of his work for an hour with the car on. I got distracted reading and messing around on my phone, and since the heater and lights were off, I had no incentive to turn the car off since it was perfectly quiet (the gas motor only kicked on once to keep the battery charged). Then, I can't remember if I turned the car off or left it on while I took a nap for an hour (he was a total of two hours late getting out of work).
At any rate, when he finally came out, I don't remember if I needed to turn the car on, but I do remember that as I pushed the brake down, put it in reverse, and began to back out, I was moving kind of fast and pushing the brake down didn't slow my motion at all. Also, it felt like there was not much resistance in the pedal. I stood on the brake and there was a noise and a jolt as I came to a stop. I really thought I had stopped because I hit something, that's how violent the stop was. But my son walked around the car and found I had not. No dash warning lights came on. I pushed the park button, powered the car off and on, then put it in drive and coasted forward / carefully tested the brakes. All was good.
I put it in reverse and used the brakes without anything seeming out of the ordinary. Then we drove 16 miles home with no issues. Until this incident I have never had a single brake-related issue apart from grabby brakes when it is raining.
This is what I have learned:
When I stood on the brakes, that is the only time the hydraulic system was in play.
Rusty brake components are pretty grabby.
Actuators are expensive and no service center wants to replace them at 92K miles.
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I have had the habit of manually shifting down to slow my 2005 GX since new. Only have 55,000 mi so not really a high mileage or worn out yet.
Now the other day there was a resistance moving into or out of a gear (can't remember which) at a time where I needed to get moving so used some extra oomph to try to complete the change and seemed to have a resistance ..... and then felt what I guess was something plastic break.
Now the selector does not stay in 4th when moved left but springs back to "D". Also feels as if the spring resistance is less. All seems looser.
What am I looking at for repair and what is really amiss? Where is a diagram to see the broken parts and how to access it? ---- Part #?
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I'm not very mechanical when it comes to cars. I have never had any clutch issue with my car. I arrived to work yesterday fine. When I started to leave it was incredibly hard to get into reverse and I had to force shifting after I left and the clutch had also lost all resistance and I could easily push it all the way to the ground. What could be a cause of the clutch always working perfect including the last time you drove it, and then 8 hours later you start up and it has done a 180. The fluid level is fine. I would presume if my clutch had went I have have slowly noticed it going.
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I've got a Gen III Prius with the remote A/C start option and am wondering if there is a way to increase the range of the key fob?
I have to park in the sun all day. My office is on the second floor of my building with a window overlooking the parking lot. I can see my car as I walk out. With summer approaching, I'd like to be able to point my fob at the car from my office, start the A/C, and have the car be somewhat cool by the time I walk down to it.
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Right from when it was new, my Prius v always seems to roll back a couple of inches when switching off the car. I just want to confirm that this is the case for everyone.
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A friend of mine slammed my passenger door with the window down and we heard a snap, and it stopped rolling up. I took him home and the next day I went to my friend that is somewhat experienced with cars and we took apart my door panel, and found these 2 objects just broken off at the bottom of the panel. What are these and where can I purchase them?
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I have been using a BMS+ with my 4KWH kit for a few weeks now. I want to know if there are any other users out there using a BMS+ with a Engineer Kit. I have found that the BMS+ to increase ICE assist and improve fuel efficiency in highway mode (greater than 70kph). Since most of my driving in is in highway mode I find this device to be very useful.
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New prius here. Is there a way to increase the intensity of the illumination in the steering wheel?
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Ok I read about replacing a bad or ailing 12v battery (mine was original - 2007 - and resting at 10.1v) and an increase in mpg's. But I didnt expect this kind of increase!
I bought the car 9-14-12 and had been driving it very hypermilishly...lol...and getting 48mpg average.
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Is it normal for the GX 470 to roll backward on a slight hill when in drive and foot off the brake?
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Was rolling up my window and I heard a pop and the crank just turned and the window just faded down into door, how difficult it is to replace it, seems like it works on a cable system from what I can see. Last time i dug into a door frame it was a gear type system, got the window jammed up with a piece of wood till the weekend....
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I used to have other car that used to make a loud beep upon locking. My prius 2010 III is bit nimble and social. It blinks and makes a little chirp. I would rather need a loud beep so to locate and ensure my car is locked especially in noisy environments.
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Is it ok to shift into neutral when the car is moving?
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Since I got Prius I've noticed that driving at 50mph returns 80+mpg , 90+mpg if I let it gently glide at -1mph per 1 mile. As it gradually slows down, the mileage starts to decrease. By the time I get down to 45 mph the mileage shows around 70mpg,
I get down to 40mph, I'm only getting 50mpg. When I keep my speed between 40 and 45 I get about 52-55 mpg for the day. If I keep my speed between 45 and 50, I get 55-60mpg for the day.
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