Interesting that 1.8 petrol owners seem to be returning better than expected fuel consumption figures, whereas some 2.2 owners have been a bit disappointed with theirs (against the official figures at least).
Maybe, it's a case of owner expectation with each engine i.e. when petrol owners bought their Civics, they expected less MPG than the diesel, but are pleasantly surprised at how efficient the i-
VTEC unit is, whereas diesel owners aren't getting the returns they expected (only in some cases, I hasten to add).