Is it possible to have a slow acting thermostat? My wife has been giving out about the fuel economy of our 166 lately, I know fuel prices have gone up and all that. Going by the car computer on a trip to Kerry a few weeks ago I averaged 33mpg, one and a half hours drive each way cross country, not great roads. She took it to Mondello on Sunday (80%) Motorway and averaged 37mpg (she had it over 40mpg if she stayed at 65mph) so I think those results seem fine. The problem is with shorter runs, I used it to drop the kids to school the other morning, drove the two and a half miles into town, spent about three minutes in traffic, dropped them off and drove the two and half miles back, I would think about 15mins in total. Had a look at the temperature gauge and it was at 70deg, 90 would be normal. Does anyone think the temperature should be up to normal by that stage? obviously the fuel economy is in the low twenties on these runs.