6 cylinders. Big
AO Silver Member
Join Date: Jun 2009
Location: United Kingdom
County: West Midlands
Hello again Mikey, I did exactly the same experiment this week crossing B'ham to get home.
After spending £89 on the tank of diesel, I was determined to save some money!
So for 2 days, Monday/Tuesday, I did the same, had air con off and turned the engine off at lights and in traffic. Was a pain as the Blue and Me kept picking up then dropping the connection to the phone and the radio would have to be turned on/off again!
Economy wise it went up from the 31.5 of the week before in stop start to 32.5. So not a massive difference. And this was with me being cautious with the throttle.
So last night I drove as I normally would, in similar traffic, and got back to 31.5. So for me it is not really worth the agro!
Should do a longer more scientific experiment I know, but also worried about battery life with constant start/stop of the engine. Also, doesn't starting add more fuel during the cycle then running normally?
The comment about the ECu being out on the mpg reading post remap is not strictly true. It is the case in a generic map for the type of engine, but a tailored map, such as the Angel one I have, keeps the ECUs ability to accurately measure the usage.
I have checked with several brim to brims over the past year and it is pretty much spot on with the mpg computer readout.
Speaking with the technician and John (?) from Angel, the assured me that this is true.
Moved over to the dark side
And loving it