Tinman is right... if you use the truck for what it was designed for, towing, hauling, ..... working, then there is no comparison to a gasser.
Ok Everybody Has Oppinions And You All Know What They Say About Them, But I Have A Few Facts For You.
In My Business I Have 2 Trucks That Are On The Road Duing Almost Identical Jobs. Both Are 3/4 Tons Extended Cabs 4x4 Autos With 3. 73 Rear Ends. The Both Put 50k On The Clock On A Yearly Basis. One Is 04. 5 Dodge With The Cummins The Other Is 05 Chevy With The 6 Litter Gasser. Both Of The Truck See A Combination Of City And Two Lane Hwy Driving Going To Bid And Inspect Jobs.
Diesel Truck 50000 Miles At An Avg Of 17 Mpg = 2941. 17 Gallons/year
2941. 17 Gallons At An Avg Of $2. 65/gallon = $7794. 10fuel/year
Gas Truck 50000 Miles At An Avg Of 11. 5 Mpg = 4347. 83 Gallons/year
4347. 83 Gallons At An Avg Of 2. 50/gallon = $10,869. 57 Fuel/year
These Are Real Figures From Our Business Logs On The Trucks The Fuel Is At The Current Local Rates Last Week Here. I Can Buy Lots Of Fuel Filters For That Difference. Both Truck Rarely Tow But When They Tow It Usually Less Than 5k. So My Figures Show That Even As Daily Drivers The Diesel Is More A Logical Choice.
My first full size truck was a 94 Dodge with the 360. Lousy mileage and didn't tow our boat as well as I thought it would (everywhere out of Reno is over the hill!) When our second kid was on the way, we got a 97 Cummins extended cab. No comparison to the gasser. The boat now was a non-issue, plus at that time diesel was a lot cheaper. We put 125,000 miles on that truck with no problems except for the self inflicted ones.We tow a bigger trailer now and I can't imagine doing that with a gasser that I'd still have to use as a commuter. Yes, the mileage of my 06 isn't as good as the 97, but it's getting there. The towing is MUCH better. Now diesel is . 25 or more cheaper than regular again. Is it worth it monetarily? I'm too lazy to do the math. Is it worth it in every other aspect? To me, absolutely. I guess that's why there are gassers and there are diesels. You have a choice.