You don't have a 2.2 on an autoboxCitroenmad wrote:True, a C5 HDi fill up is between £90-£100 at the moment, depending on how much the fuel is and how low the tank was. That is a noticeable amount! Mind, it does last a good few miles.
I'm not really trying to make anybody agree or disagree, just to think outside the box as it were.
Well im not convinced, but there you go. We seem to disagree about a few things at times
Why would you think that? (the answer is that we always equate wear with more leakage but it aint necessarily so)
Why bother getting the injectors re calibrated when the car is fine?
I was asuming the injectors are fine regarding your theory, as its trip computer has always been out since the car was new, i doubt it had injector problems then and doubt it does now. Any main injector problem usually causes a rattle at rist, its running very sweetly with no rattle, loss of performance or MPG drop. Im very happy with its 45MPG.
Besides, surely if its actually doing better MPG than the trip says, how does that suggest an injector is at fault or not calibrated. You would think it would inject more fuel, not less
Calibration can go both ways we are after all talking about small amounts here a 1 bar error on the fuel rail pressure is in the wider scheme of things insignificant but it will results in slightly less or more fuel being injected each stroke similarly with injector calibration there is not an absolute figure for any calibration, it will always be +/- minus a percentage and it's this percentage which gives the difference between the two readings. Now in your case you get better MPG than the trip suggest you should, which actually implies that their is a slight fueling deficit i.e if that was made good you would get slightly improved performance at the cost of slight increase consumption. However overall you are happy with the balance and don't consider that it's worth bothering about, fair enough.
Understood and I am just trying to make people think a little more about the implications of the difference not just dismiss it "as the trip is always wrong"Anyway, all of this is really besides the point I was initially making, its a valid point to check the actual MPG and see how or if it differs to the trip reading.
In summary checking by burning of a known amount of fuel against a mileage is the MPG you get, the Trip MPG is the mileage you should be getting.