Diesel vs gas......................
OK folks, there have been a few to many diesel vs gas threads that have shall we say gone to "Hell and a hand basket"! So if all of you would put in you BEST, no flaming reasons for going gas vs diese...
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5200rpm for 100k miles? Why? Even with my lethargic 5.4L, I only occasionally turn 3800-4200rpm on the uphills. Easily less than 1% of our travels. Also, using gear reduction takes the load off of the engine by the percent of the gear ratio so although the engine is running at higher rpm well below it's peak hp rpm, it's doing less work letting gear reduction take the load. Like 2:1 rope and tackle to lift a load. You might have to pull the rope twice as many times but, it will require half the effort on each pull. As for the 5200rpm wearing an engine out, during R&D, Chrysler ran the 5.7L Hemi 300 hours at peak hp rpm full load. Upon dissection, it showed only normal wear and nothing broke or melted. The Cummins can also be run full load at peak hp rpm for hundreds of hours with no ill affects. Loading at low rpm puts more load on the lower end bearings. It's not "easier" on the engine as your ears might suggest.
