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Old 07-18-2019, 04:15 PM
 
Location: brooklyn, new york, USA
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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.
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Old 07-18-2019, 04:17 PM
 
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No.

https://auto.howstuffworks.com/car-d...s/odometer.htm
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Old 07-18-2019, 04:18 PM
 
Location: brooklyn, new york, USA
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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.
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Old 07-18-2019, 04:19 PM
 
Location: Central New Jersey
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Mileage won't be added but if it has an engine idle meter, that'll keep going up
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Old 07-18-2019, 04:21 PM
 
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Quote:
Originally Posted by Hairy Guy View Post
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.
Read the article. Based on wheel rotation, not engine.
https://auto.howstuffworks.com/car-d...s/odometer.htm
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Old 07-18-2019, 04:21 PM
 
33,387 posts, read 34,830,354 times
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Quote:
Originally Posted by Hairy Guy View Post
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.

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.
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Old 07-18-2019, 04:23 PM
 
Location: San Diego
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Your odometer is tied into your transmission. It measures distance driven when the car is in gear.
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Old 07-18-2019, 04:24 PM
 
Location: brooklyn, new york, USA
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thank you all.
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Old 07-18-2019, 04:28 PM
 
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Generally no. I can't think of a single vehicle where the mileage ticks up with the engine on without the transmission rotating. However, large trucks (including our Duramax) also tracks hour rating of engine usage. We've got over 4,000 hours on ours.
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Old 07-18-2019, 04:56 PM
 
Location: Tricity, PL
61,672 posts, read 87,060,489 times
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Quote:
Originally Posted by Hairy Guy View Post
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 curious: why are you "idling it for hours on end, every day for a month??" ...
do you want to show someone that you went somewhere?

Last edited by elnina; 07-19-2019 at 09:28 PM..
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