Ian C

Thanks for the replies. I have been using Regular fuel and definitely in D not 4 gear setting. I have had it in to a garage who have put in new spark plugs and done a road test attached to the ECU which has reported that the consumption is averaging 24.8 mpg???? The other tests done on the engine have readings in the spec ranges , so I am told. No issues have been flagged from all this testing.

I have just bought a 2008 ALphard 3litre and have calculated the fuel consumption to be 15.5 mpg. Is there any advise as to what could be causing the low reading . I took to a garage who changed the spark plugs and tested the emissions and which are in the acceptable ranges. Ian C