Quote:
Originally Posted by some_other_dave
I've seen film of someone who filled their 911 with diesel instead of premium unleaded. Truly staggering amounts of smoke were coming out of the tailpipe...
Did anyone else notice the "takes several minutes of idling to warm up" statement? Sitting stationary with the engine running is generally very bad for fuel economy. For shorter trips, I imagine that would eat up all of your fuel savings, and then some.
-soD
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Actually, I wrote: ""......when the ambient temperatures were -15 deg. F., ....... Cold starting is OK, although it is necessary to allow the engine to warm a couple minutes before driving away to avoid stalling." Not significantly different from the engine's behavior on straight gasoline when the temperatures are below -10 deg. F. A short period of idling to allow oil film to build and internal heat stresses to dissipate is good practice in extreme cold.
In this instance, there is no smoking. The exhaust appears the same as it does on straight gasoline, no change. The odor is slightly different, just a little odd.... one would be hard pressed to know the change is due to diesel.
Of course, that excessive idling always hurts economy is true. Be moderate, even in moderation.