On a 57 plate TDV8, whenever my trip MPG approaches 25.2 it resets itself to 24.5!
I have seen this a few times now, sometimes even going down a long hill it'll suddenly drop! Today the trip said 25.1,so I set the cruise at 60mph on the motorway and kept an eye on it, sure enough after a few minutes when I'd expect it to go up, it dropped to 24.5!

Has anyone else seen this?
I guess the answer is probably to get the software updated. Had me worried when it first happened, thought I had a problem or a leak!

Andy

Tisk! Tisk! If you'd gotten a petrol, you would never have to worry about 25.2 mpg!

Sorry, I don't know the answer, but I couldn't resist the comment.