Originally Posted by
texans
It an old myth. In the old days everyone use to say it was better to let a diesel idle than to constantly start it. It just not true today. Today's diesels have a lot of emissons that make it bad to idle for extended periods. I will let mine idle if it is going to be just a min (like fueling up, or running in a store to grab a drink), but that's about it. I just read a story on yahoo this morning about this. In the artical it said you burn 1/4 to 1/2 a gallon an hour idleing. Some people think you burn more gas starting the truck then you do idleing. I don't see that.
You should take yahoo with a grain of salt, and anybody else who preaches global warming "green" In that same article their quoted as saying the old myth "replacing your air filter helps your car run efficiently" And yahoo's response was "modern fuel injection engines don't get economy benefits from a clean air filter". They mind as well told people that changing motor oil is a waste of money and not necessary.