Why not doing your own repairs will make you go bankrupt.

Yes if spec’s correctly.

 

Wasn’t uncommon for mechanicals to get a million miles before overhaul after oil quality got better in the late 70’s early 80’s. I know of plenty of them that are getting close to that and more nowadays with todays oils. Oil quality is what killed engines back then. Oil couldn’t stand to live with itself longer then 3000 miles. Mix a little water, coolant, and fuel into it and it was instant death for any engine.

 

I agree with @SmallPackage I walked into my Cat House one day and the shop boss say's hey Steve, I got something for you. He pulls out a coat and hat with "million mile club" embroidered on it. He said Cat was running a campaign for documented engines going a million miles without an overhaul.

It was simple maintenance, run the overhead, roll in a set of bearings, change oil, change filters with OEM, and keep the coolant chemical balance in check and always looking things over. Find little things and nip them in the bud

 

And the interesting part was they were getting that while running 1800-2100 rpm all day long. Lol!

 

Rolling a set of bearings in the bottom end at 500,000 was common too. Rebuilding a timing advance every 250-300,000 miles. They weren’t exactly maintenance free.

 

It was so common they were giving away embroidered jackets.

 

But nothing sounds better than a properly tuned mechanical. And they are a blast to drive and I ain’t mad at a fella for keeping one.

 

Yup, you scheduled your major maintenance items at your convenience. No computers or emissions systems derating your rig when you least expect it

 

How many late model trucks have you driven?

 

Agree 100%, It's only my opinion but I think newer trucks sound like a vacuum cleaner, but they are nice and quite. But a properly tuned mechanical cat..... watch the water temp, watch the pyrometer watch the boost. Maintain it, don't abuse it and work it hard. 1 million miles