I know that there have probably been tons of debates on which is best, so I'm not trying to start that kind of thread here. What I am asking is that people relate their own experiences - good or bad - with either the 6.0L and the 7.3L

I've been shopping for an Excursion and am curious about how the 6.0L in the and newer models stacks up against the 7.3L in the earlier ones.

I know the 6.0L has more power, but what about fuel economy? Reliability? Major weaknesses of both? I am especially interested i how they do with alternative fuels (specifically home-brewed biodiesel)?

I'm looking at this mainly as a people mover - not a major towing rig. About the only towing I would expect to do with it is pulling a 2000 pound boat.

What kind of fuel economy do they generally get?
Any particular weaknesses or problem areas?

Again, PLEASE keep it constructive, and share YOUR experience with these motors - don't bash on the other choice.