Cummins life

Ok i know this has probably been listed a million times but i have to know, i am a gasser as of now but am really in the market for a Cummins, what is the average life span on miles? like should i steer away from a CPD with around 200k? or is that just getting broken in?
Thanks for all the advice.

Well maintained, they can last your lifetime. Some guys will mention million mile Cummins engine.

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i cant wait to get a cummins, they will last forever if you properly maintain them.

The engine will last you 500k+
But it is still a dodge truck on the outside and will need much more maintenance as you reach those higher mileage

I agree with Cody on this the engine will last indefinitely but wear and tear will cause the rest of the rig to die in time it just happens. You can get over 300k on a gas engine these days but they also will be limited by the body around it.

If maintained the engine will outlast the truck. If the price is right and you have records for the truck 200K is not bad. I see posts of people looking at 6.7's with 300K + miles.

If you do a suspension refresher on em, you should be good with a 200k truck.
Just don't expect a new truck, because you certainly won't be getting one!

Bluesmoke91 said:

Well maintained, they can last your lifetime. Some guys will mention million mile Cummins engine.

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There's a Cummins that lasted a million miles!

i love mine ctd baby hope its the last truck i had to buy ...an feels good to have it payed off

Just be sure you are ready to deal with a diesel. I thought I was until I got a lot of good advice here from people. I am going to have to stay away from diesel, as much as I want it. It just does not make any sense for me to go diesel. Read some of my questions and answers. Just to be absolutely certain you want to go diesel.

Deal with a diesel? Fill it up change oil and fuel filters use good quality filters and you are set. Pretty simple really until you start modifying them. High mileagestarts around 300,000 on a poorly maintained older truck and 200,000 on a newer one. And I'm talking about 20k oil changes not you guy who goes over 6 k once or twice. Well maintained and good filters will last 500,000 to 800,000 easy and a million isms achiveable

Barkern143 said:

Ok i know this has probably been listed a million times but i have to know, i am a gasser as of now but am really in the market for a Cummins, what is the average life span on miles? like should i steer away from a CPD with around 200k? or is that just getting broken in?
Thanks for all the advice.

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If you look at any cummins, and the owner says "its just getting broke in" or "its not even broke in" yet...

Walk away while calling him an idiot.


That has to be my biggest gripe with MOST cummins owners, is that one ******** line...While the cummins will go a million miles or more if properly taken care of, You have to remind your self, you arent going to be riding JUST a cummins engine, theres a dodge truck under it...

Any fool who is selling a truck with 100/200/300k miles on it, and says its barely broke in, needs to be slapped very hard, right across the face. I dont give a damn what ANYONE says, you start getting up near 200k miles, and its ALOT, you had better be prepared, and have money saved for upkeep and repairs.


I love my cummins, it does everything a gas truck will do, but better, and with better fuel mileage. Only real complaint is the engine is loud, which makes daily routines kinda annoying(drive throughs, talking with truck running and standing outside etc etc)

Lostnwalmart said:

Deal with a diesel? Fill it up change oil and fuel filters use good quality filters and you are set. Pretty simple really until you start modifying them. High mileagestarts around 300,000 on a poorly maintained older truck and 200,000 on a newer one. And I'm talking about 20k oil changes not you guy who goes over 6 k once or twice. Well maintained and good filters will last 500,000 to 800,000 easy and a million isms achiveable

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On my 01 daily driver cummins, Ive gone 17k miles, with just a filter change, then again i regularly send oil in for analysis...and it always comes back great..I run royal purple full syntec, maybe thats a contributing factor, i dunno...

Upkeep on my diesel's have been little to none, like you said, change the oil, keep up with everything, and enjoy lol.

smiley3303 said:

I agree with Cody on this the engine will last indefinitely but wear and tear will cause the rest of the rig to die in time it just happens. You can get over 300k on a gas engine these days but they also will be limited by the body around it.

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That was the saying back in the day about the slant 6 and 318 engines... they'd last 2 or 3 bodies. Of course, cars disintegrated even faster back then.

As for the CTD - I hope mine is the last truck I buy.

01dirtydzl said:

If you look at any cummins, and the owner says "its just getting broke in" or "its not even broke in" yet...

Walk away while calling him an idiot.


That has to be my biggest gripe with MOST cummins owners, is that one ******** line...While the cummins will go a million miles or more if properly taken care of, You have to remind your self, you arent going to be riding JUST a cummins engine, theres a dodge truck under it...

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My next favorite is guys claiming 22-24 mpg avg. per tank and sometimes higher

They do great on fuel especially considering the size and weight but that a stretch, highway miles maybe but not an average

Stangshcky12 said:

My next favorite is guys claiming 22-24 mpg avg. per tank and sometimes higher

They do great on fuel especially considering the size and weight but that a stretch, highway miles maybe but not an average

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Honestly, in my 01 daily, thats stock height and tires, if i keep the speeds around or under 65, my commute to work is 60 miles one way, mainly highway, i averaged 23..It does surprisingly well, MY fuel mileage went up when i bumped up the lift pump pressure to 19 at idle, and started adding a quart of 2stroke with every fill up.


I usually end up running it until the low fuel light comes on, which leaves 7 gallons in the tank, i can regularly get 650 per tank, when i turn it up, or go 70+ i usually get around 500/550 a tank...fuel mileage drops like a rock the faster i go..

01dirtydzl said:

On my 01 daily driver cummins, Ive gone 17k miles, with just a filter change, then again i regularly send oil in for analysis...and it always comes back great..I run royal purple full syntec, maybe thats a contributing factor, i dunno...

Upkeep on my diesel's have been little to none, like you said, change the oil, keep up with everything, and enjoy lol.

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I was refering to the nonsynthetic oils, but oil analysis allows you to know for sure the condition of the oil. On dino oils I like 7-10k intervals for no good reason on my own cars/truck. But recamend shorter changes for other people due to seeing weird things happen oil now spanks the oil from the past.