Thanks for all the responses and the realisation I am not the only one

Right continuing to be sad (but not as bad as TheBoy with his books and spreadsheets and VB'd databases showing trends and price comparisons to OPEC oil barrel prices etc etc

)
please dont take offenceFirst observation is that you six pot guys have better MPG than us 4 pot lowlife sorts. Ah well! thats what you get from having to work on them more often. Anyway arround 22 - 25 is the norm for a 4 pot
Just filled up on lpg again after having the LPG ecu "fettled" and now getting 17.5 calculated from the receipt. BUT . calculating the same milage, 172, with the number of gals on the MID get to 21.5 mpg which is the same as the MID average (so thats how it calc's it

). Result getting what should it be ish.

Setting of for the Cote D'Azur 8-) on Friday with the tribe and filled to the gunnels with stuff so will report back on that trip.

Would be nice if the was a maintenance guide on what to look for/do to get the best, or fix bad, MPG with us all having these guzzlers
As a footnote have just sold the previous meg (xreg) on fleabay for 1220 yet another result

(although he's not picked it up yet). :-/