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I like my old 12 valve Cummins because it has power, and gets 24 MPG on the highway.

24mpg at what speed in what conditions? Low speed in the plains states, the kind of speed that nobody actually drives at, I can believe that. We all know how aerodynamics work (I'm betting you drive a 2nd gen)...

We both know a stock 12v is grossly under-powered by early-mid 2000s standards.

And if you've got a close to stock (nobody gets 24mpg with 35s and a lift) 12v powered vehicle that isn't a completely clapped out POS or very, very rusty you're probably not wheeling it much if at all...

Was I close?

Driving the speed limit, on the highway. If you ever hear the turbo, back out of it. IP timing was tweaked just a bit, but other than that it is a bone stock 1996 Dodge 3500. And, yeah, it's a clapped out just rolled 300,000 mile truck.

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