Oil change

[Lunentucker]

I drive 75ish miles a day round trip m-f driving to work. I live rural but work in the city. Almost all of my miles are highway.
I certainly didn't buy it for the gas mileage!

Given the longer drives at highway speeds, I'd say you'd be fine to stretch the intervals to 7500 miles. That's going to work out to an oil change about 3X a year for you.

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[mannym]

Given the longer drives at highway speeds, I'd say you'd be fine to stretch the intervals to 7500 miles. That's going to work out to an oil change about 3X a year for you.

I purchased a three oil change with tire rotation package from the local Jeep dealership for $160. I thought it was a good deal.

 

[GrubbyBaja]

Be careful with the tire rotations. I thought i was being smart by finding another Rubicon wheel so I could put the brand new, matching, spare tire into a 5-tire rotation. Here I am 53k miles later, dying to put on 35s, and my damned original 33" tires probably have another 15k left in them. No way wife approves new tires until they are down to the wear indicators.

 

[Jteakus]

Mike, I always try to get new tires at around 50% tread. I make someone a great deal on a used set and I get some new shoes.

 

[TexasAg77]

My Glad came with free oil changes to 100K. 4 times/year max. Am getting the first one done next week at right at 5K.

As a side note, I put 250K on my LJ w/ a 4.0. Bought it with 49K. Sold it at 310K. Changed the oil every 5K for the 11 years I drove it. ( 70+ miles each day to work). Didn't burn or leak oil and ran like a top. Ran PZ High Milage 10-30 and never a problem. Hope the Glad is as good...

 

[slodsm]

I’ve always done every 10k with royal purple and a wix filter. I’ve got a cubic butt ton of miles on 4 different 3.6’s over the past 10 years and never had one give me a single hiccup.
5k isn’t hurting anything, but it’s unnecessary.

 

[agoldxj]

I’ve been doing 5-6k in both of ours. Rotate my own tires, if you’re taking to a dealer make sure you mark your tires to make sure they actually do the rotations.

 

[g2020]

I go by the book. The following post is a summary of service interval info in two versions of the owner's manual, as well as the intervals mentioned earlier in this and other motor oil threads.

Motor Oil & Oil Filter Service Intervals

 

[Dilly’S Willy]

Be careful with the tire rotations. I thought i was being smart by finding another Rubicon wheel so I could put the brand new, matching, spare tire into a 5-tire rotation. Here I am 53k miles later, dying to put on 35s, and my damned original 33" tires probably have another 15k left in them. No way wife approves new tires until they are down to the wear indicators.

Sounds like you need to drive with TC off and more throttle more often A little sideways fun responsibly will get you there sooner.

@mannym You're forgetting the MOST important part: CHECKING OIL LEVEL. No really, there's a reason engine that have sludge still run, and it's not the oil changes...it's because they made sure the level was full.
Sludge is caused by extending oil changes, and I've seen modern engines with sludge while following the 7500/10k OCI standards we've seen over the last decade in under 100k miles. Using cheap oil, filters, fuel, and not doing OCIs soon will destroy your engine via sludge/low flow just like running low on oil.

Seriously, Jeep's allowable oil consumption is 1200mL/1000mi. So they allow your engine to consume all 5qts before the OCI would suggest you should change it, and why the owner's manual says to check and top off oil as needed.

My 2021 Willys is consuming about 1.5qts every 5k miles, and has been since I got it around 27k miles, now has 43k miles and I'll be measuring how much was consumed this weekend when I change it again. I do 5k OCIs for many reasons, but I'm not starting that escapade here. The dealer even said "that's not good, but that's also not unheard of either for the 3.6L even at those low miles". Yet my bored/stroked wrx running 10.5:1 AFR (extremely rich) doesn't consume a drop of oil in 3k ABUSED miles, and it's got 30k+ of those ABUSED miles on the build. But I change the oil every 3k, with Amsoil 5W-40 Full SAPS (for cam lubrication), using an OEM Subaru filter, and I check the oil every time I get fuel, or make a long drive, or after a day of having fun with it.


Just remember this when someone tells you "the manufacturer says it's fine, and they made the engine": that manufacturer once agreed you should change your oil every 3k miles (conventional oil days) or 5k miles (synthetic became mainstream). Then the EPA started cracking down every 2-5 years on emissions, forcing manufacturers to adopt new practices to reduce the fines they would otherwise pay the EPA for non-compliance.
- This caused: 7500 mile OCIs (now 10k mile OCIs, or reduced back to 7500 after initially 10k), smaller displacement engines (usually sub-2L I4 or sub-3L V6 w/ or w/out turbos) replacing larger engines (often 3L+ V6/8 engines), CVTs and/or 8/9/10 speed autos and/or DCTs (which are significantly more prone to failure than the planetary autos, and being used more often again because of this), the death of sports cars/trucks/suvs due to new regulations related to EPA/CARB.

TL:DR
- OIl level is just as important, if not more important than the time/miles between changes.
- Change your oil with full synthetic (not blend) every 5000 miles.
- Change with OEM Mopar oil filters EVERY TIME you change the oil.
- Don't use the OCI screen/reminder to do your OCI, use it as a last resort/longest allowed OCI duration.

Follow these recommendations, and you should see 200-300k miles easy. They get Subaru engines lasting 500-700k miles in the rust belt

 

[BourbonRunner]

The e46 gets every 5K with LiquiMoly and a sample generally sent every other to Blackstone for analysis. It's higher miles and gets their Ceratec treatment, too and runs incredibly well. I likely will invest in similar for the JT and similar interval.

 

[Bandit’s Lair]

I run it down to around 10% then do my changes. Mine is a daily though and it runs over 60 miles per trip. The longest it’s ever sat is 2 days without running. That’s an important part of the sludge issue. If it doesn’t get a chance to settle and sludge up it usually won’t. I do run Seafoam about 150 miles before every oil change.

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