Quote:
Originally Posted by jcp123
I disagree. I lived in the South Bay long enough to know that while you have pretty mild temperatures in Walnut Creek, your nightly lows get cool enough for a block heater to matter. I had a low here in east Texas of 39 last night and a high in the 50s. My FE got slaughtered. A block heater would have gone a long, long way. +30*f coolant temp when you start the car makes a BIG difference.
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I have a 1999 F350 Crew Cab with a powerstroke diesel. I run the block heaters year round. In the winter it is a must to start but in the summer I get 2 mpg better because the engine is already warm and runs much better.
With a gas motor running a block heater in the summer your engine would start and immediately go into closed loop mode and get much better gas mileage.