Diesel vs gas......................

hindle_az wrote:
LOL...sure the same gear ratios will put out the same RPM but there is NO WAY a gasser of the same displacement (without forced induction) is going to pull anything of substantial size in comparison with the Diesel counterpart unless it's running lower gears.

Before you laugh too much, you should have a look under the hood of your truck. See that round rusty looking thing on the top of the engine at the back? That is your turbo charger. How do you think your diesel would stand up against a gasser of similar displacement if both of them were naturally aspirated? That 6.0l gasser would blow the doors off your truck even if it was pulling 10,000 lb up a 6% incline and you were running empty if your turbo died.

hindle_az wrote:
I have a GMC2500HD duramx and rode with a guy that pulls a simliar size trailer as mine also running a GMC but a gasser. His truck was constantly shifting and struggling to maintain 70MPH on somewhat on flat grades with a small head wind. My truck in the same situation would be in overdrive with cruise control and getting 5 to 6 more MPG. Can you imagine what would happen if it was running the same gear ratio of my diesel? The Diesel's can pull the taller gear ratio because they have the torque that simply isn't there with a gasser hence the better mileage, less shifts, etc...

Why do you say "struggling"? A gasser generally develops its power at higher rpm than a diesel, so it would be appropriate for the gasser to downshift before the diesel. That does not mean it is "struggling", just that it is doing what it is supposed to do.

Also, notice that I said "generally". There are many diesels available now and more being developed that produce their power at 4,000 or more rpm.

hindle_az wrote:
Obviously everything has pro's and con's but if you do any decent amount of towing with a large trailer Diesel wins on paper everytime.

If you can't deal with the smoke, dirty pumps, noise then get the gasser.

Then, by your own admission, diesels do not win every time. Many people do not like the stink or noise of diesels or the mess always found around the diesel pumps at gas stations. The GM 8.1l gasser will pull with any unmodified diesel available today from any manufacturer. This is not as cut and dried an issue as many would like people to believe. If you like diesels, great, get one. If you don't, great, buy a gasser. There are pros and cons to both.

Bert