Do car milometers record when reversing, go backwards even?
Just a random thought I had, (and effect obviously insignificant towards mileage).
Let me guess, your lease is due to expire and you're almost at your total mileage allowance, and are thus planning to reverse everywhere from now on?
Additional question - if you freewheeled in neutral (or engine off) down a big hill, would that count too?
Are you a friend of Ferris Bueller?
Friend of mine had a VW Beetle, he was told by a mechanic that you could 'rewind' the milage.
Coupled the speedo cable to his electric drill, and left it running in reverse overnight.
It wound the clock back 6 miles.
I'm surprised nobody implemented a one way clutch to prevent this, then again the vast majority of cars wont be affected by the small miles they spend reversing...
as another point its a shame we don't have engine hour/rpm meters, sure the car might only have done 10k but who knows how long its been sat idling or how hard its been run.
Any newer car logs mileage in both directions, and they log the mileage in the engine ECU as well as the dash cluster.
If the cluster is interfered with or replaced and does not match the ECU then it will flag a fault. Most manufacturers won't sell a cluster without seeing the car, reading the noise from the ECU and coding it to that car with the mileage in it already.
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Cameron, come pick me up!
It’s a system fitted to my 2001 Boxster (so not recently then!!), and can be viewed every time the diagnostic kit is plugged into the car’s data port. If you were to have a pre-purchase inspection, you should expect to be told...
Basically, the system logs every time the Rev limiter kicks in, so I would hope that other manufacturers who use limiters would be able to ‘harvest’ similar data.
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Last edited by Pete D; 30th October 2019 at 23:18.