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[Wayne]

Hi Everybody

now that the petrol prices have soared, im finding im needing to fill up more on my bloody gas guzzler

is the trip computer on my V6 CDX Model accurate?
it says i`m getting 32.8 mpg, i drive 36 miles per day to work and back, drive at about 60 - 65mph and not a bit faster! coz i`m tight!   

i have noticed the fuel computer part is pretty accurate, it said i had 4 miles left on my petrol 2 days ago, just made it to a BP station

i have also noticed that my engine management light (error code for knock sensor) has gone off since using BP petrol and never going near ASDA, TESCO or SAINSBURYS anymore....
the EML light was on for over 6 weeks, within 2 days after changing to BP, it stopped, or has the sensor repaired itself while i was asleep? 

Cheers chaps 

[05omegav6]

The trip computer is reasonably accurate, but in the way it works it has to make certain assumptions which are not always correct. :-/

Easiest way to be sure of consumption is to brim the car and reset the trip counter on the speedo and the trip computer, say on the way to work. Then the following day/week re brim the car. This will tell you how much fuel you've actually used over the distance that you've driven between fills, and also what the computer thinks you have done. Any discrepancies between the computer and reality will tell you how accurate (or not) the computer is.

Branded fuels tend to have less crap in them, so engine management will soon appreciate the change. I believe that the ecu 'refreshes' itself periodically. ie if a sensor detects an unexpected value it will put the light on, but if, after a while the unexpected value returns to normal, then the light will go out again because that issue is resolved.

HTH

Al.

[Tonka.]

I have also noticed that my engine management light (error code for knock sensor) has gone off since using BP petrol and never going near ASDA, TESCO or SAINSBURYS anymore....

This happened to mine. It hates Tesco fuel and runs far better on Shell 

[dbug]

I have also noticed that my engine management light (error code for knock sensor) has gone off since using BP petrol and never going near ASDA, TESCO or SAINSBURYS anymore....

This happened to mine. It hates Tesco fuel and runs far better on Shell 

Last time I put Shell in from my local service station I developed a misfire - once the tank had emptied and I'd refilled it with supermarket (Waitrose) petrol, the misfire immediately disappeared. 

[TheBoy]

The petrol trip computers are fairly accurate, though the range reading can be a bit variable, as it relies on a mechanical float, and these have varying tolerances.