MPG Decline from Colder Weather or Winter Blend Gas or ???

[cfg83]

RobertSmalls -

Originally Posted by RobertSmalls

cfg83, is 30A the rating of the fuse/relay, or the actual power draw? If that's the actual power draw, it costs you the better part of a horsepower. That's a whole lot, but it's very low duty cycle, while the aerodynamic benefit of a better-blocked grille is continuous.

Winter is coming, and I'm thinking about stepping up my game with a block heater, and grid-charging of one or both batteries. Plugging in and colder weather seem to go hand-in-hand.

It's the rating of the fuse. I have never tested the actual draw. This year has been a "bigger dropoff" from last year. It's more noticeable, so I am miffed.

CarloSW2

[brucepick]

Even so, cooling fans can draw a lot of power. I wouldn't be surprised if it draws 20-25A. If you have a ScanGauge you can monitor coolant temp so you'll know if you have too much grill block installed.