It might be worth looking at the discussion thread marked "Fuel economy". When I put this one out last year Skippy 41 sent me a reply dated 11/6/08 regarding the gearboxes in the earliy Carens, their propensity to disintegrate and their dubious pedigree.
I don't know how to contact individuals directly, but Skippy41 seemed to know quite a bit about the subject.
Regards.
Edited by: marsie222