> When you sit in your car and idle, and you have the heat going, you actually burn quite a bit of fuel.
Stupidity will be the downfall of America.
Sure, the electric fan blowing the (mostly) free warm air from the engine block may cause the alternator to load the engine for a few watts, but I doubt you could measure the difference after burning a tank of fuel.
If it was the AC compressor loading the engine then it’s a different story.
WTF are they teaching in school?
I think they mean if you are sitting in line for an hour or more waiting to get gasoline that you will waste a lot of gasoline just sitting there running the engine.
“If it was the AC compressor loading the engine then its a different story”
The affects on gas mileage when using AC in a fine tuned automobile is negligable. Maybe 2 miles to the gallon. I know, I watched Mythbusters blow this theory up> :)
It is true though. It is a myth that excessive fuel is used while running the AC. Down here in Tejas, the AC is a necessity in the summer, if you don’t want to sweat your @alls off. I don’t lose mileage like some think one might. I still get 420 miles to a tank, with our without AC
Are you sure cars divert heat from the engine bloc into the cabin? I can get the heat working with the engine turned off and presumed there were electrical coils to heat the air.
I also wondered if it is even risked by automakers to divert engine bloc heat into the cabin due to the inherent safety risks - CO intake, fumes from heated oils and coolants, etc.