CharlieS
Gold Member
A bit of diesel in gas will do no harm. Actually it will do much the same as an upper cylinder lube as well as help keep the valve train clean.
As far as gas in diesel fuel, Years ago Catapiller did a test on truck engines, running as high as 10% gas mixed with fuel and found no harm to the engines after 250K miles. While i'd be hesitant to run that percentage, In the wintertime, in frigid weather we routinely run 1-2% gas in our truck's fuel tanks to prevent fuel from gelling.
As far as gas in diesel fuel, Years ago Catapiller did a test on truck engines, running as high as 10% gas mixed with fuel and found no harm to the engines after 250K miles. While i'd be hesitant to run that percentage, In the wintertime, in frigid weather we routinely run 1-2% gas in our truck's fuel tanks to prevent fuel from gelling.