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Old 08-27-2015, 12:13 PM   #11
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Location: Full timer,,,at Lake Georgetown in central Texas for the winter.
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I laboriously towed my 6600# Jayco TT up the Rockies in low gear going painfully slow to prevent overheating in my 1997 350 gas Silverado and after I got my 9400# Windjammer and started pulling it with my 2004 6.0 F250 diesel, it was all the difference in the world. We pulled over Monarch Pass in Colorado and my truck didn't even know that the trailer was behind us. And Monarch Pass is no molehill either. I highly recommend a diesel over gas.

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Old 08-27-2015, 12:14 PM   #12
Join Date: Apr 2015
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Another consideration that I haven't seen mentioned is that with a Diesel Truck and a big Trailer, you can fuel at commercial truck lanes. Lots of room to maneuver, and fast pumps! Every time I pass a gas station packed with cars, I'm grateful to fuel with the semi-trucks... Maybe it's just me...

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Old 08-27-2015, 12:21 PM   #13
Join Date: Aug 2015
Location: Sun City Center
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After having 3 diesels from 2000 to 2014, I switched to a gas F350, with a 410 rear. I haul 12,500 pounds of fifth wheel and I didn't have to pay the $6000 dollars extra to get the diesel. So, that helps pay for the less fuel mileage. I will agree that there is nothing the diesel will not pull but the price of the diesel fuel and the expense of filters and additive just seemed to keep adding up the cost of ownership. Also when the diesel broke down on the road it was just a bit more difficult to find a certified diesel mechanic, but a gas motor can be easier to find a repair shop for most problems. With all that said there is nothing more exhilarating than firing up a diesel motor first thing in the morning, fueled with testosterone. It just comes down to what do you want?
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Old 08-27-2015, 12:27 PM   #14
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Location: Marion, LA
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I've had both. Either will do the job. Check the blogs for the diesel engine postings on the diesel you are looking at. There are some problem diesels out there, but most are solid for 200 or 300k miles with only minor maintenance.
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Old 08-27-2015, 12:34 PM   #15
Join Date: Nov 2014
Location: Winnipeg, MB
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IMHO it all comes down to personal preference. I really like the low end torque that I get with our Duramax but that's just me. Once up to cruising speed I hardly notice that we have the fiver with us. While I don't have any empirical data to support it I still believe that we get better fuel economy at highway speeds with the diesel. Our experience is that headwind vs. tailwind is still a huge factor no matter what engine you have. Personally I wouldn't want to go back to a gasser a tow vehicle.
2015 Silverback 29IK
2010 Silverado 3500HD LTZ
6.6 Duramax / Allison 1000
2015 nights camped - 42
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Old 08-27-2015, 12:39 PM   #16
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Location: Where ever my DH takes me!
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Talking 1999 Ford F350 8 foot bed crew cab

Originally Posted by usvipaul View Post
I thinking of upgrading my truck. I currently have a 2012 Tundra 4.6l DC 4x4 and pull a 2011 Rockwood 2604. The truck pulls fine here on the east coast, but I'm retiring next year and DW and I want to travel west and I know this truck won't do mountains well. I'm looking at some used Silverado/Sierra 2500hd trucks. My dilemma is do I go with a 2006-2009 Duramax LBZ/LMM in the $30-$35000 range (low miles) or something like a newer 2011 6.0l gas engine? I know the diesel will do it fine, but I worry about a used diesel and maintenance/repairs. If anyone out there has any experience towing with a gas 6.0 2500hd pulling a 6000lb trailer (5800 empty) in the mountains I sure would like to hear from you. Thanks for a great forum. Can't go a day without checking in here!
Thanks. Paul
We went from a gas Class A to 39 foot fifth wheel towed with 1999 Ford F350, 7.3 diesel with power booster and 4 inch exhaust, 8 foot bed crew cab. Have towed it thru WV, Pa, and Western New York state and to Florida. Not one problem, and a very smooth ride. The savings in fuel has allowed us to camp a little more often. By the way the truck used with 103,000 miles only cost us $14,500. That is considerable less than newer trucks and the 7.3 is an awesome engine.
1999 Ford F350 7.3 diesel.
2012 Sandpiper 346RET
Just absolutely love our 5er!
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Old 08-27-2015, 12:44 PM   #17
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I have own both a gas Chevy 6.0L and now the Ram with the 6.7L Cummins. I will never ever go back to pulling any trailer with gas engine. Why the fuel mileage was terrible, the engine stayed in the higher RPM's when ever we needed to start moving the trailer at least 3,000+ RPM's and trying to put gas in the truck almost cost me my marriage.

The Cummins torque is down low around 1100 to 1500 and some times as high as 1900, but never ever above 2000 RPM's when pulling. Fuel mileage is between 10.5 and 11.5 MPG when I am pulling my trailer (hand calculated). When on the road I fill up at truck stops with no issues at just pull in fill-up and pay. Easy in and out; this is extremely important when the combination of the truck and trailer is over 55' long and the trailer is 13'6 tall.

In fact we do not own any gas driven vehicle since we bought the Ram new in 2008. My wife now drives a VW TDI Jetta.
Jim W.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67
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Old 08-27-2015, 01:10 PM   #18
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Location: lakeville pa
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If anyone out there has any experience towing with a gas 6.0 2500hd pulling a 6000lb trailer (5800 empty) in the mountains I sure would like to hear from you

I have a 2015 2500 HD gas and pull a Silverback 5er that weighs 12k lb.
Pulled through the mountains in West Virginia and Tenn. and it did great.
Jack and Joanne
Lakeville Pa
2015 GMC 2500 HD
2014 Silverback 29 IK
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Old 08-27-2015, 01:20 PM   #19
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Not a fan of GM nor duramax but if you're getting a 3/4 ton truck, get the diesel.
The tundra with 5.7L would be a good TV for your 6000lb trailer.
2013 Rockwood 8282WS
Reese Revolution Pin, Reese 16K
2008 Tundra Limited Double Cab 5.7L
Air Lift 5000 w/Wireless Air

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Old 08-27-2015, 01:21 PM   #20
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Location: Elkton, MD
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It's your decision, but I'll just say the gas engine running at 3000 to 4000 RPM is running close to it's max power band, there is nothing wrong with that, the engines are designed for that. Some people say it's too loud running like that, I have a GMC 2500HD with 6.0 and it doesn't sound very loud to me in the cab, I've ridden in diesels where the engine noise in the cab was louder.

Diesels get better mileage but depending on where you are and the cost difference of fuel, it might not be less expensive, there's a gas station on every corner, I don't think they all have diesel.

Diesels are good, gas engines are good, they both do the same job just in a different way.

Jack and Jan
Nights camped 2014 - 8 | Nights camped 2015 - 23 | Nights camped 2016 - 24
2015 Ford Super Duty F350 > Blue Ox Swaypro WD Hitch > 2015 Rockwood Windjammer 3008W
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diesel, gas, towing

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