TGMO 0w-20, 4k mi; 2024 Tacoma

[SimpleSyrup]

2nd fill using TGMO 0w-20. Factory fill dumped around ~700 miles, ~5000 miles on the engine, so roughly 4000 miles on this sample. OEM filter as well.

This was using a freshly purchased 6 pack of TGMO from a dealer. It was the API SP rated stuff. Used to be that TGMO had more moly than a rave concert, but now it looks pretty mid. Oil still in spec as grade goes, but seems very thin for a 20w. Looking at other UOAs from people who used the TGMO, theirs came in around the low 7s on the 100c viscosity, so either fuel, shear, or both. Did a good bit of high speed driving in a nasty crosswind with about 1000lbs in the truck which really killed my mpg. Was getting 10-12 mpg for a while.

Non hybrid version of this engine.

 

[LazyDog]

What you you consider a good viscosity??
6.2 does seem low! Toyota more likely cheapen the blend, lower cost.

 

[SimpleSyrup]

What you you consider a good viscosity??
6.2 does seem low! Toyota more likely cheapen the blend, lower cost.

Well, looking at the other samples people had with this same oil in the past 6-12 months, their UOAs were coming in around 7 cst at 100c. Older VOA with the high-moly additives came in around 8.4. Picked up 12 quarts, but think I'll use the other 6 quarts in a different vehicle. I used a M1 5w-30 for the refill on this vehicle.

 

[fantastic]

Won't ever truly know unless you get a GC fuel test. Not sure if ALS offers that or not. Report is what you'd expect for newer engine. Thanks for sharing.

 

[Astro_Guy]

Interesting and thanks for posting. Someone commented on the Moly content in a recent TGMO UOA that I had posted. Maybe they are lowering the Moly content? Many more UOAs will be required to draw any meaningful conclusions.

 

[SimpleSyrup]

Won't ever truly know unless you get a GC fuel test. Not sure if ALS offers that or not. Report is what you'd expect for newer engine. Thanks for sharing.

So, serious question, does it really matter what caused this reduction in viscosity? Because in the end, wouldn't the advice be the same: consider going up a grade or using a xw-20 that runs on the higher side of the 20 weight?

This assumes that the oil formulation is stable from recent VOAs, and that it in theory should be a slightly higher viscosity at 100c than it is from the sample.

 

[zuluplus30]

Thanks for this. I just bought a TRD Sport.

UOA looks fine; my only comment is there’s NO way this engine will make the 10K intervals that Toyota calls for. Reaffirms my decision to stay at 5k OCIs

 

[SimpleSyrup]

Thanks for this. I just bought a TRD Sport.

UOA looks fine; my only comment is there’s NO way this engine will make the 10K intervals that Toyota calls for. Reaffirms my decision to stay at 5k OCIs

Maybe not with this oil, but I think it would do 10k with a more robust oil.

 

[The Critic]

Because in the end, wouldn't the advice be the same: consider going up a grade or using a xw-20 that runs on the higher side of the 20 weight?

Not necessarily. The wear levels appear to be perfectly acceptable.

 

[fantastic]

So, serious question, does it really matter what caused this reduction in viscosity? Because in the end, wouldn't the advice be the same: consider going up a grade or using a xw-20 that runs on the higher side of the 20 weight?

Good question, My advice in your case is not going up a grade (yet). Since the engine is new it's a bit harder on the oil. Once everything levels out on your UOA can we then reassess the results. At that point you'll want get fuel tested to see If it ends up being a fuel issue that's causing the decrease in viscosity. Motor on for now IMO. When your UOA results start to plateau then GC fuel test.

 

[JHZR2]

Not necessarily. The wear levels appear to be perfectly acceptable.

Wed see less Fe in 13k miles on the previa engine, on older spec oils, than this one shed in 4K with the latest lube tech. Of course this one is still wearing in.

 

[The Critic]

Wed see less Fe in 13k miles on the previa engine, on older spec oils, than this one shed in 4K with the latest lube tech. Of course this one is still wearing in.

These tests only capture a narrow range of particle size. Unless the results are horrendous I wouldn't be using this data to determine appropriate oil viscosity.

 

[JHZR2]

These tests only capture a narrow range of particle size. Unless the results are horrendous I wouldn't be using this data to determine appropriate oil viscosity.

You may be making assumptions about the size of wear products shed, which may not be true.

 

[The Critic]

You may be making assumptions about the size of wear products shed, which may not be true.

Not sure if I follow?

My point was that this UOA only provides a narrow scope of the wear that is actually taking place. I don't think it is appropriate to use this data as the sole reason for making viscosity-related changes.

 

[SimpleSyrup]

Well this is interesting.

Same engine, same (but not same) oil but the older formulation. Same reduced 100c viscosity down into the 6s. Their test has fuel dilution at almost 5%.

H

Thread '2024 Lexus RX350 UOA - 782mi / TGMO 0W-20 782mi'

Feb 20, 2024

First Oil Change post "Engine Break In" on a 2024 Lexus RX-350. Plan on doing a second oil change at the 1,500 mile mark (another 700ish miles after that), then at 3,000 and every 3,000 thereafter. This was using Factory Fill 0W-20 from Lexus/Toyota.

I noted the high silicon which I presume is from the break in process. Somewhat concerning on high Fuel Dilution. I recall when I changed the oil, I did smell a gasoline scent so I'll be monitoring this. I drove the vehicle about 30 min prior to this oil change and primarily run it on 25 min hauls twice a day (not really taking short...

• Hawkins12
• Replies: 33
• Forum: Used Oil Analysis - Gasoline

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[edyvw]

Unless there is extreme spike in wear metals, it is irrelevant. There are too
Many variables to get any conclusion on whether oil
Is cause of less or more wear.
It is UOA, not analysis of used engine.
On that note, I would bump grade to at least 5W30 ILSAC, preferably 5W30 or 0W30 Euro.

 

[dedonderosa]

oils cheap, engines are not. 5k mile intervals with a good 5w30 or 0w30 would be best here IMO. def would not go 10k oci

 

[wareze]

Id consider Castrol edge or m1 ep for this truck

 

[SimpleSyrup]

Id consider Castrol edge or m1 ep for this truck

Ended up getting in on that M1 Truck and SUV closeout / error at Advance Auto for $10 / 5 qts from Feb or March. Quite literally backed the truck up on what the 3 stores near me had in stock. So put the 5w-30 Truck and SUV into the Tacoma. Haven't put maybe 1000 miles on it in the last few months so it'll be a good year until I change it again.