2018 JL Wrangler Engine Bearing Failure

[AnnDee4444]

At FedEx they just doubled the oil change interval and still stay in warranty. 72,000 miles now between oil changes! Including the first one. Oil lasts longer than most think.

Do you know how often they change filters?

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[JimLee]

 

[av8or]

Do you know how often they change filters?

When I retired 2 years ago it was still 36k between oil and filter changes. A friend that still works there in the shop just confirmed on road tractors it’s 72k for first oil and filter change. It seems crazy to me that a brand new truck (I was lucky enough to get a brand new one every year the last 14 years I worked there) goes from assembly line to in service pulling triple trailers at 100,000 + lbs., and doesn’t get any fluid or filter changes for 72k, but I guess I’m out of touch.

FYI 90% of these trucks are Kenworth or Peterbilt (both made by Paccar) with Cummins ISX 450 engines and they have a 750,000 mile warranty.


I made this point simply to show that the idea of changing your oil every 3k or even 5k is kind of an antiquated idea, but I got put in my place by a much smarter poster.

 

[Gregj]

When I retired 2 years ago it was still 36k between oil and filter changes. A friend that still works there in the shop just confirmed on road tractors it’s 72k for first oil and filter change. It seems crazy to me that a brand new truck (I was lucky enough to get a brand new one every year the last 14 years I worked there) goes from assembly line to in service pulling triple trailers at 100,000 + lbs., and doesn’t get any fluid or filter changes for 72k, but I guess I’m out of touch.

FYI 90% of these trucks are Kenworth or Peterbilt (both made by Paccar) with Cummins ISX 450 engines and they have a 750,000 mile warranty.


I made this point simply to show that the idea of changing your oil every 3k or even 5k is kind of an antiquated idea, but I got put in my place by a much smarter poster.

You are comparing apples and oranges, those OTR trucks have oil capacity in gallons, not quarts. They also have massive oil filters and need the extended OCI or they would be changing the oil every week or two.

Mentioning them here only muddies the conversation.
Gregj

 

[AnnDee4444]

Cummins ISX:

Advertised Horsepower	385-600 HP (287-447 kW)
Peak Torque	1450-2050 LB-FT (1966-2779 Nm)
Governed Speed	2000-2100RPM
Clutch Engagement Torque	1000 LB-FT (1356 Nm)
Number of Cylinders	6
Oil System Capacity	14 U.S. Gallons (52.9 Litres)
System Weight	3093 LB (1403 KG)
Engine (Dry)	3021 LB (1370 KG)

 

[av8or]

My intentions are not to muddy any water, so if I have I apologize. I’m not very good at fully explaining why I brought up the OCI for our work trucks.....so a little more explanation.

40 years ago common OCI for autos was every 3k, and for our big rigs it was 12k. As technology in metals, oils, filtering, and machining advanced, the need to change oil that often changed. In the big trucks I’m referring to the OCI is now 6 times longer than it was 40 years ago and in autos it’s more like 3-5 times longer. So in my opinion the OP doing 10k between oil changes is fine and I doubt the bearing failure was oil related, most likely a very rare anomaly in part production or assembly.

Fire away if you like.

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