Now that this thread has got me thining about it, why don't Nissan and other SUV makers offer diesels with the new 2007 emisions and low sulfer fuels coming?

This is the only way SUVs are going to survive in this "NASA-priced gasoline" day and age. Those Tahoes might be selling hot right now, but if gas hits $4 a gallon (it already is up here), those 18 mpg small blocks are just not gonna cut it. A V6 Duramax getting 25 mpg on the other hand, just might save GM's big utes.