thank you for explaing it so clealy. even i understand now
![Big Grin](images/smilies/biggrin.gif)
will do a couple more brim to brim fills and do the calculations. although getting "10l/100km" urban is very nice in an 1.8 auto the size of a rover75...
i'll track down mr keith and appeal to him for help. would love to know whats wrong with my beloved
again, thank you for your help
![Smile](images/smilies/smile.gif)