I know there is a very similar thread in Maintenance. I have remote start on my car, and I use it, everyday in the winter. I usually start it 3,4 minutes before I walk out the door so the heater and defroster can get a head start. My mom/dad have remote start on the 4.6L expedition, and also use it alot. More than I do, they will often start it anywhere from 5, to 10 minutes before we leave. It is nice to go out and have at least lukewarm air blowing, and it will start blowing hot air pretty fast.
I personally think that remote starts have no real detrimental effect on the engines. For this, I point to several things. Police cars. 4.6L Crown vics, and Chevy Impalas, Chevy Tahoes. Anyone who is familiar with this will know that Police cars spend a huge portion of their time idling. The crown vics usually later become taxis, and depending on where they are, idle a huge portion of the time too. The engines in all these are in just as good shape as ever. Can't speak from too much knowledge on this, but from what I know, before some states put the maximum idling time on big trucks, drivers would leave the engines running while they slept.
These engines all survive, so it leads me to believe that remote start does not harm the engine at all.
I personally think that remote starts have no real detrimental effect on the engines. For this, I point to several things. Police cars. 4.6L Crown vics, and Chevy Impalas, Chevy Tahoes. Anyone who is familiar with this will know that Police cars spend a huge portion of their time idling. The crown vics usually later become taxis, and depending on where they are, idle a huge portion of the time too. The engines in all these are in just as good shape as ever. Can't speak from too much knowledge on this, but from what I know, before some states put the maximum idling time on big trucks, drivers would leave the engines running while they slept.
These engines all survive, so it leads me to believe that remote start does not harm the engine at all.