A while back, I changed my dashcam to show the GPS speed when moving. It was quite eye opening about how 'off' the speedometer was in the Avensis and the CT. I presume a lot of cars might be like this. Even new tyres of the original size didn't really 'fix' it.
It got me thinking... If the car isn't able to calculate the speed accurately, then is the mileage odometer technically also inaccurate? (showing lower miles than true)
And what about MPG calculations.. are they also understated as a result of inaccuracies?
I wonder if this can be corrected using some sort of MultiECUScan level tool (in the case of Fiat) or equivalent for other brands
I used to lock the Avensis on the speed limit (according to the digital screen) and wonder why 70% of people still overtook. Now, as I'm locked into the 'correct' GPS speed, I see some new cars / other cars (usually German to be fair) also bang on the 'correct' speed for the road. Quite interesting discovery to find that for most of the time when I thought I was going the right speed, I was unknowingly holding people up... and other slow coaches, are probably unknowingly doing the same
It got me thinking... If the car isn't able to calculate the speed accurately, then is the mileage odometer technically also inaccurate? (showing lower miles than true)
And what about MPG calculations.. are they also understated as a result of inaccuracies?
I wonder if this can be corrected using some sort of MultiECUScan level tool (in the case of Fiat) or equivalent for other brands
I used to lock the Avensis on the speed limit (according to the digital screen) and wonder why 70% of people still overtook. Now, as I'm locked into the 'correct' GPS speed, I see some new cars / other cars (usually German to be fair) also bang on the 'correct' speed for the road. Quite interesting discovery to find that for most of the time when I thought I was going the right speed, I was unknowingly holding people up... and other slow coaches, are probably unknowingly doing the same