Originally Posted by bismic
I would sure like to know where your info came from and how it was determined! I personally believe that is WAY too low.
a buddy of mine was out of town and it was going to drop between 40-50 below and he didnt have anywhere to plug it in so he filled it up parked it for 9 hrs and only had to put in about 3 gals. so yeah about 1/3 gallon/hr. im sure it has quite a variance from truck to truck but he told me its in the manual somewhere as about a quart/hr (i have not read this so i cant verify whats printed)
regardless of what it actually is, its nothing to be worried about for 20-30 mins if it means your engine is nice and warm before using it.