Love the "I carefully track my mileage and do the sums" brigade. Oh really? You use what for the mileage? GPS? must do because you do understand that the mileage on your car is not true mileage in the same way as the speed is not true speed.
er, we covered that one up there. The accuracy of the milometer is unconnected to the accuracy of the speedometer. Haven't yet got round to calibrating my current one (on the motorway, 11 miles is almost exactly 17.7km which you can check against the posts - yes using that level of accuracy is really geeky - or you can of course use a GPS) but my last one was a bit less than 1% over, which is the worst I've had.
Do all you high-mpg folk also switch off the air-con and other electrical items?
In my last car it saved 2mpg, so I never bothered.
Best way is to have them gutted and the DPF deleted from the ECU's software.
In an ideal world yes. But it's technically illegal and in the future a missing DPF could result in MOT failure.
Also you have to make sure you get a decent remap so the car doesn't flag up phantom DPF errors
Currently awaiting the fate of my car today... I think I could be looking at £1500+ for a new DPF 🙁
Do all you high-mpg folk also switch off the air-con and other electrical items?
No, it's never made much difference in my cars. Any difference seems to be overwhelmed by variations in weather, season, traffic and type of driving.
Some of this advice comes from the USA I think where a/c compressors tend to be very large and powerful, and crudely designed and implemented. I once drove a Hyundai Accent 1.6 that was specced for Texas weather, and if you had your foot to the floor you'd feel a huge surge as you turned off the a/c!
b r - Member
Do all you high-mpg folk also switch off the air-con and other electrical items?In my last car it saved 2mpg, so I never bothered.
I don't bother in my car, as it doesn't seem to make too much difference and I'd rather have the comfort of the climate control.
In my other half's Ka, the a/c made a massive difference to mpg & performance so that only came on when necessary!!
dmorts - Member
In an ideal world yes. But it's technically illegal and in the future a missing DPF could result in MOT failure.
Why is it [i]technically[/i] illegal? It is illegal to remove the catalytic converter on a car that has one fitted but a DPF is not a cat, they are different things. So if the DPF is removed but the cat is still present, is that illegal?
