I get that. I don't howerver, think that a few lightbulbs will cause up to 3mpg loss.
Thanks. I understand all the variables that effect fuel. All other engines I have run usually saw a mile per gallon drop in winter on ave. Maybe...
I have a FL with an M11 in it. 400hp with 4.11 I was getting on ave 8-9 mpg in the warm weather. As soon as the cold hit it dropped to 5.6-6 mpg....