RAM TRX Forum (2024)

I’ve had two 5.7L Hemi’s that were pretty flawless. I put 60,000 miles on each one, and other than routine maintenance I never had an issue (my 2004 I had to replace a water pump, and on the 2012 I had a couple exhaust manifold bolts fixed). I’ve seen multiple 5.7L and 6.4L Hemi’s go for well over 100,000 miles. If I remember correctly the Hellcat is a destroked 6.4L with 90% of the internals rebuilt (there might be more to it than that). So the question is, how many miles do we think the Hellcat is good for? I do less than 10,000 miles a year, so I’m not really worried about it. I’m just more curious than anything else.

I am going to say good for 250,000. I have it figured that by the time I will hit 250,000 miles, I will be taking a dirt nap, or no longer driving, so I am sticking with that! Sorry that it may not have been the technical engineering answer you may have been looking for.

I wish that they would do all the deferred maintenance and do some real quantitative measurements on how healthy that engine is. It seems to be a perfect candidate to see what real world long time abuse does to these motors. Let’s get a compression test a dyno run and a blackstone oil report.

Any motor today should do 200k easily with proper maintenance, including hellcats. If you run it hard, then maintain it hard (i.e. more frequently, more intensively).