Blackstone Oil Report Repository - Share Your 2UZ Reports

[dace voit]

1. No engine damage or overheating. 115K currently on motor.
2. Mobil 1 full syn 5w-30 with M1 extended mileage filter. There were a couple of changes in between these reports.
3. 7400 miles first change, 8600 miles second change. Somehow, the report got better with a longer interval.

I've been wanting to see what the oil looks like for extended intervals since not using conventional oil. Changing oil a 5k with full synthetic seems wasteful to me given the reputation of the 2UZ...

 

[Hbbutler01]

1. No engine damage or overheating. 115K currently on motor.
2. Mobil 1 full syn 5w-30 with M1 extended mileage filter. There were a couple of changes in between these reports.
3. 7400 miles first change, 8600 miles second change. Somehow, the report got better with a longer interval.

I've been wanting to see what the oil looks like for extended intervals since not using conventional oil. Changing oil a 5k with full synthetic seems wasteful to me given the reputation of the 2UZ...
View attachment 2944172View attachment 2944178

Man this makes me want to try a 7500-8000 mile interval haha

 

[mdcoa]

Man this makes me want to try a 7500-8000 mile interval haha

Based on my last results, they told me to try 9000, and I use regular old non-synthetic!

 

[dace voit]

Based on my last results, they told me to try 9000, and I use regular old non-synthetic!

We’re told to change motor oil WAY sooner than most users typically need to.

 

[AlpineAccess]

I'm at 5700 miles on this current oil change. Mobil 1 full synthetic 5w30 and mobile 1 filter. Pulled a sample and its still mostly transparent with golden coloring. My last Blackstone results showed the oil serviceable at 4500 when I was changing it and recommended pushing to 7500, so I'm going with that.

Based on what you all are seeing instead of changing it, I may pull a sample and then see if I can push it further.

I'm interested in if with these modern synthetics we can just do a filter swap and keep the oil running.

 

[crimsonaudio]

I'm interested in if with these modern synthetics we can just do a filter swap and keep the oil running.

The new Mobil1 filters are rated for 20k miles.

 

[Pahizzl]

I decided to change out the oil since I was close to the 1 year mark. Did an oil analysis since nobody had any hard evidence that going past a year was harmful. Sounds like changing oil based on a scheduled time interval is not required, but I was using synthetic so I’m guessing that’s the reason for the acceptable readings. Not sure how non-synthetic would hold up.

 

[crimsonaudio]

FWIW, under BlackStone recommendations I've gone as far as 12k between changes, but settled on 10k miles as it's easier to keep up with - oil and filter change at 180k, 190k, 200k, etc. Zero issues so far.

 

[crimsonaudio]

1. Damage/Neglect: none
2. Motor Oil/Filter: Mobile1 5w30, Mobil1 filter
3. Change interval: 9k miles

 

[Biga27110]

Hmm should I be worried.

 

[suprarx7nut]

Should have let this interval linger longer!

1. Damage/Neglect: none, but this mileage includes a few days in Moab and around 100 miles of towing ~6000 lbs. Also a good amount of idling serving as my mobile office.
2. Motor Oil/Filter: Castrol Edge 0-40 / Toyota Filters (changed around 6k into the interval)
3. Change interval: 12k miles

Amazingly this interval required absolutely zero oil between changes. How cool for an engine with 242k miles to not burn any appreciable oil in a year and 12k miles.

Next up: 15k miles or two years, whichever comes first. Should be buying a separate commuter car this year so I expect the LX miles to slow a bit going forward.

 

[donj51]

1. Damage/Neglect: none
2. AT: Baseline change
3. Change interval: Baseline

 

[FrankieJoe14]

1. Damage/Neglect: Motor is not original to the truck. Mileage on motor is approx 190k. It did sit inside for about a year prior to being installed 3 years ago / 40k miles ago.
2. Motor Oil/Filter: Mobil-1 5w30, Toyota filter 90915-YZZD3
3. Change interval: 5k miles

 

[Eighteen11R]

1. Damage/Neglect: None
2. Motor Oil/Filter: Mobil-1 5w30, Toyota filter 90915-YZZD3
3. Change interval: 9k miles
4. Mileage: 132,500

 

[YezusLX]

This was my baseline after purchase and jumping timing from PO's poorly installed T belt tensioner per Toyota dealer. I have since discovered a radiator leak near the trans fluid port. Might be the source of the copper. Replacing with new OEM radiator this week.

 

[TexLexican]

I perform oil analysis on jet engines and I do not see how accurate these results can be, especially if they are recommending upwards of 10k oil change intervals. Who knows where these universal averages come from, but regardless, it’s not from your engine.

Ideally, you want to analyze the oil more than once while it’s is in the engine. (We pull samples on jets every 20 hours without changing the oil.) Providing only one sample does not show you an accurate trend analysis!

If Blackstone tells you that iron at 4ppm is normal, they have no idea when that 4ppm accumulated. From miles 0-5000 it could have been wearing normally to 1ppm, but from miles 5000-6000 it shot up 3 ppm to 4ppm.

 

[suprarx7nut]

I perform oil analysis on jet engines and I do not see how accurate these results can be, especially if they are recommending upwards of 10k oil change intervals. Who knows where these universal averages come from, but regardless, it’s not from your engine.

Ideally, you want to analyze the oil more than once while it’s is in the engine. (We pull samples on jets every 20 hours without changing the oil.) Providing only one sample does not show you an accurate trend analysis!

If Blackstone tells you that iron at 4ppm is normal, they have no idea when that 4ppm accumulated. From miles 0-5000 it could have been wearing normally to 1ppm, but from miles 5000-6000 it shot up 3 ppm to 4ppm.

The universal averages are... universal averages, lol. The average of all tests Blackstone performs - either on all gasoline engines or perhaps your model. I'm unsure which is the case, but regardless it's just a rough number so you have some vague clue what's "normal".

Of course more test points is better and you're welcome to do that. When you send in the samples you tell them whether or not the oil was changed at this time and you indicate if you're interested in longer change intervals. If you want tests every 1000 miles you can do that to trend the shape of the wear curve for a given interval. That's logical for a plane where mis-managing lubrication can kill people or cost tens/hundreds of thousands of $$ in damage. It's overkill for a road-going commuter car.

The goal with these inexpensive Blackstone tests is to find significant problems before they catastrophically ruin an engine and/or to validate long change intervals.

When you run a test at the end of your oil interval, you know that the contaminants were introduced in that overall oil life span. That's helpful to know and you don't really care when the contaminants were introduced beyond knowing that it occurred in fewer miles than when you pulled the test. Providing the one sample during a change does show you a trend if you repeat that sample. It shows a trend over the life of the engine (not the oil change in particular). If you do a few tests in a few oil changes you will generally find an interval that yields an acceptable contaminate level.

The alternative is to do nothing and blindly change oil. That's fine, but it's certainly less useful than having a sample tested to indicate whether or not you're changing too early or too late.

 

[TexLexican]

I’m not even sure what the FSM recommends as far as intervals and whether that number is bc of oil degradation or what Toyota engineers have decided on for other reasons.

But if too early is every 5k miles with synthetic then I’m fine with that. Blackstone has its limited purpose, but it’s not the final word.

 

[shtbrwn86]

1. Damage/Neglect: None
2. Motor Oil/Filter: Kirkland Full Synthetic 5w30, Mobil-1 Extended life filter
3. Change interval: 8k miles
4. Mileage: 260,000
5. Did sit a bunch the last year for small repairs and cost of gas.

Pretty happy with these results. Probably going to switch to 10,000 miles or 1 year, whichever comes first. Thoughts on the Toyota filter vs. Mobil-1? The Toyota filter is substantially bigger? Does that matter for filter life?

 

[suprarx7nut]

1. Damage/Neglect: None
2. Motor Oil/Filter: Kirkland Full Synthetic 5w30, Mobil-1 Extended life filter
3. Change interval: 8k miles
4. Mileage: 260,000
5. Did sit a bunch the last year for small repairs and cost of gas.

Pretty happy with these results. Probably going to switch to 10,000 miles or 1 year, whichever comes first. Thoughts on the Toyota filter vs. Mobil-1? The Toyota filter is substantially bigger? Does that matter for filter life?

View attachment 3115845

#5: not necessarily. The overall filter area is what matters and pending how tightly packed the pleats are the outer size isn't all that meaningful. Like for like, bigger is better, but I wouldn't fret either one.