That's interesting Daniel. Shame that Lexus Oxford aren't being very helpful - are you thinking of moving away from the Lexus network to independent yet anyway though, at that age of car?
£20 fillups do sound attractive, but then again it's a long payback period - sounds as if it works for you though.
I've seen mention of the resetting problem you mention, but mine has never done it, miraculously, so perhaps it's not an inherent fault in the design, rather a case of some do some don't.
Colin, I had missed that post - maybe I blinked.