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Thanks for that information Diesel Dave.
It would be nice to get to the bottom of this, fuel "may" be getting wasted by as much as 10% in the winter months if people are feeding their diesels cold air on a cold winter day.
Would the oxygen sensor in the exhaust control any over fueling
caused by the warmer and lets face it more combustible air
Could less dense (warmer air) actually use less fuel to burn then the cold dense winter air
I would like to find a study on air temperature and diesel economy not air temperature and max diesel hp.