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What's the Mileage Life expectancy of 1990-1992 Dodge with the Cummins 12 Valve?

04-17-2006, 10:07 PM
Trying to figure out what the mileage life expectancy of an older Dodge, a D-250 or D-350 will be with the 1990-1992 Cummins 12 valve Diesel in it. Alot of the rigs I've been looking at are around 200,000 miles already or a bit higher.

I know the projected lifespan for your average gasser is around 100,000 to 150,000, but not certain what to expect from the Diesel line.

04-18-2006, 04:59 AM
Well actually if the truck has been serviced regulary [ oil and filter changes] the cummins engine should be good for 500k miles or thereabouts. The rest of the truck depends on how it was used or abused like any other vehicle. I have a 92 d250 with a cummins and auto with around 350k miles and pull a trailer which weighs 6000 lbs and no problem at all. Also have a 94 with same engine and tranny combo with about 130k miles which is just broke in. Hope this helps you, just my opinion......regards Bob M.

04-18-2006, 09:52 AM
Yup, the diesels will go for a long long time. Count on at least 250-300K, and like funcruise said, 500K with good maintenance.

04-18-2006, 05:49 PM
Try, you can read forums without being member. Check "1st gen" forum.
Lots of info.

04-19-2006, 04:04 AM
well if it was cared for on average 400 to 500 k
here is a good check engine warm open oil fill tube no blow by (smoke) engine is still tight also if it sqeaks the belt when shut off when warm most likely it is still strong when the cummins was first put in the dodge cummins said the would put a million mile warranty on the motor
dodge said nope we won't go that far with it.

hey I.M.H.O. best auto diesel on the market!!!!!!!!!!!

04-19-2006, 08:26 PM
National average reported through Dodge is 300k. I personally know in my area we have one tow company that has a 1st gen with a little over 1 million miles and all they have done to it was replace head gaskets once. We have another tow company with early 2nd gen trucks, 2 of them have over 1.5 million and now rebuild. They are maintaned very well. I know these numbers are true because they have been maintaned and documented through our local dealership, and I know the people who own them. I would have a hard time believing it otherwise. But even at 300k average, you can rebuild them twice at resonable cost, there is no reason you couldn't get a million out of one.

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