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No, it's not really time related.
2500 miles or 3 months oil change
- Thread starter Jeep Junkie
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I could save a lot of money by using the Jeep's waste oil.
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So mileage related, oil should stay there till 4000 miles? My TBN was 6.1 when I changed the oil so I should wait at least to 4.0 TBN?
NO! Or at least be very cautious going that route. For a period I did a lot of serious off roading, and I did a lot with a group of regulars. Among that group, several used those valves (myself included), and in a couple of instances the rough terrain got in the way of the valve. In most instances in such terrain a spotter was used, and it could be seen by the observer that the valve was a point of impact with the ground. In one instance the valve was ripped out of the oil pan ... damage followed. Knowing that, and seeing the issue first hand, I stopped using the valve. YMMV, but be cautious.
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It takes a combination of mileage, time and hopefully getting oil up to operating temp. The AW additives will lay down a film or plate like barrier. How would you know when your TBN is at 4 unless of course you do a UOA? Your TBN was still like new at 6.1. Like I previously mentioned. if you're worried about fuel dilution
you could bump up to a higher grade of oil which may be helpful also. If you want more info concerning TCB do a search.@dnewton3
has some pertinent posts.
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My TBN was 6.1 after 2,500 miles, Blackstone report says, I sent a sample to them. Oil was Pennzoil Ultra Platinum 0W-20. New oil might have a TBN of 10 or 9?
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I don't believe the starting TBN is that high on that oil.
I would say between 7.5 and 8 is more like it .
Change your oil as you desire....but I don't think any benefit would be derived doing it so early. Besides, if you want your Jeep to last to 500k miles....a lot of heavy off roading isn't going to help.
I wouldn't say stupid, but this is obviously excessive. A 5K OCI is excessive in most cases, but it isn't stupid either.
You enjoy changing oil? OK. Have at it. Throwing away money is not problem? Have at it. If you think that will give one more mile of service out of the vehicle? Nope-it won't
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Is there a particular oil that has TBN of like 15? I could run that oil and then change it every 7500 miles?
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I bought so much oil recently I wanted to do like every 2000-3000 also on my new car. I want to see which oil it likes the most. Also going to compare oil samples and cold start/idling noise
The Xterra in my sig gets oil change every 3750 miles +/- like the manual says but its still on semi synthetic.
My Frontier with the same engine gets every 5K +/- on full synthetic.
I use the opportunity to do a full inspection, grease the u-joints, and check everything else. A stitch in time.
To each his own. For the most part the crowd here will tell you its wasteful - which is probably true. But this is America and its your time and money to waste - or thats my response at least.
Good luck - nice Jeep!
My Frontier with the same engine gets every 5K +/- on full synthetic.
I use the opportunity to do a full inspection, grease the u-joints, and check everything else. A stitch in time.
To each his own. For the most part the crowd here will tell you its wasteful - which is probably true. But this is America and its your time and money to waste - or thats my response at least.
Good luck - nice Jeep!
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Just received some more 
But I will do 4000 mile oil changes this time. Thank you friends!
But I will do 4000 mile oil changes this time. Thank you friends!- Joined
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Don't know about 15 TBN but 12 is around the highest number I've heard of and they would be long drain oils, HPL and Amsoil come to mind. With your apparent mindset I'd say your a long way from going anywhere close to the mileage that those oils offer. Good luck.
Just keep doing what you are doing if you like changing fluids. BTW that's a really nice looking Willy's Jeep.
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I do 5k OCI on my Jeep - filter 10k - Fram Ultra - I think the less you touch that filter housing the better. Have changed Xfer case twice and differentials 2/3 times bcs they had visible shedding early on as experienced by others … 4 years old at 34K - a few hundred miles in 4WD - I might do the coolant at 5 years old…
The port injected Pentastar does not have a reputation for fuel dilution - but BS has a mediocre reputation for measuring that with the methods employed …
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I'm moving to 6 month changes on my Civic, because 90% of my driving is short trip in the city. I also enjoy changing oil. Gonna change the filter every other change. And moving from 0W-20 to 5W-30, due to fuel dilution.
4WD
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I was mainly using 30’s and then 0W40 - after a bit I assumed it was causing an oil pressure pattern change. Went back to 0W20 and it’s still doing it (in/out of high pump stage at low load/RPM)*
I’ll go back to 5W30 and monitor it again …
*regardless of oil temperature
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