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miles driven is based off TIRE revolutions, not engine revolutions. when you idle the engine you are getting zero mpg because you are not going anywhere.
No. It measures off the transmission. If you disconnect the drive shaft and run the car in gear without moving, you will log miles.
Engine hours will vary.
My truck has 5400 engine hours but only 168,000 +/- miles. That is because it idles a lot either to provide power, AC, or setting up to pull something. I have slept in the truck for hours with it running for heat or AC.
Jump start a lot of cars. Pulled a number of cars and suvs out of ditches and the like. Also if you go off road you will clock in a lot of engine hours but few miles because you are making very slow progress. I do not off road a lot, but some.
If you live in or near Los Angeles or similar you will log a lot of engine hours and very few miles. Whereas if you live in Montana, it will probably be the opposite.
It will vary for any car. the new stop start cars will have considerably lower engine hours.
Why don't you just buy a trickle charger to keep the battery charged up? They cost about $20 on Amazon, or available at any auto parts store. No need to let the car idle in the garage. That's a good way to get carbon monoxide poisoning.
If I turn on my car and let it idle for hours on end, does that count as "miles driven?" Example, I buy the car new with 0 miles. I idle the car for hours daily for a month. Over that time, will it actually show miles were driven because the engine/RPM was running? I am trying to sell a car and don't want to add mileage any further but do turn it on once a week so the battery does not die.
Just get a trickle charger (battery minder, float charger - lot of names). If you do not have a power source, get a solar one. It odes not take much to keep the battery charged. Also make sure you have real gas (non-ethanol) or add Stabil to your gas if you are going to leave the car sitting.
If I turn on my car and let it idle for hours on end, does that count as "miles driven?" Example, I buy the car new with 0 miles. I idle the car for hours daily for a month. Over that time, will it actually show miles were driven because the engine/RPM was running? I am trying to sell a car and don't want to add mileage any further but do turn it on once a week so the battery does not die.
No, that would count as engine hours. My GMC Sierra has an hour meter you can bring up in the center screen on the instrument cluster.
Most industrial equipment such as bulldozers, farm tractors, even lawnmowers count engine hours as a gauge of how much use the piece of equipment has seen.
But the logic of a car being driven is based off RPM itself, isn't it? How else does the car calculate mileage? It's gotta be based off a certain number of engine RPMs over time. There is no other way for the car to know how far you drove it then.
Cars engines SHOULD track by hours running instead of miles driven like an airplane or boat engine. Which car is the better deal? The 1 month old car driven from coast to coast a few times, or the 1 year old car with low miles, but sits in traffic for 2 hours a day?
But the logic of a car being driven is based off RPM itself, isn't it? How else does the car calculate mileage? It's gotta be based off a certain number of engine RPMs over time. There is no other way for the car to know how far you drove it then.
Just leave your A/C off. Your odometer is run off your A/C.
What a relief! Here I was thinking it ran off my radio. I've been playing rock music and I was worried about running up the miles, so I changed to an easy-listening station so I could keep the mileage down. If I had to listen to one more elevator-music-song, I was going to drive off a bridge. Which brings up the next question......if I'm flying through the air, but the wheels are turning, does the odometer register the miles?
<snort>
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