I have read that diesel motors run most efficiently on cold air and I have read that they run most efficiently on warm air.
Most who drive a diesel notice mpg losses threw winter. Could the cold ambient outside air be responsible ? or has it nothing to do with cold air and more to do with winter mixed diesel. Is the winter mix diesel in all gas stations and what months would it be used.
Do people realize poor cold weather mileage even on summer diesel ? If so would warm intake air aid? or is it more to do with a cold block than poor combustion.
A turbo compresses the air in that process the air gets heated just by being compressed it also gets heated by friction and the hot exhaust gases on the turbo. The intercooler, cools that hot air.
When driving efficiently I am not using my turbo or intercooler, the air is not being heated up by the compression of the air in the turbo, meaning it is not as hot as it normally is.
"This would be the time that warm air intake could aid the burn"(my opinion)
Here is some food for thought, if running warmer intake air causes higher combustion chamber temperatures could it mean a more complete (hotter) burn occurred?.
