As far as my car goes, it always takes a long time to warm up and the temp gauge fluctuates back down to cold a lot pretty much year round. It's just a lot worse in the winter. I'm getting suck-ass gas mileage but of course that might be attributed to other car issues...The car runs so cold in the winter, I couldn't hit vtec if my life depended on it (not that I would want to all the time).