2022 Corolla Cross HPL PP 0W8 20,080 Mile OCI

[OVERKILL]

The thing about oxidative thickening is that it goes from worsening to very bad quite quickly. Don't know if HPL follows a similar pattern.

But after seeing this chart, as unscientific as it would seem, I tried to gauge any thickening during dipstick checks just in case I had gone too long, especially as this chart suggests that different full synthetics have varying life spans.

And this is exactly why UOA's are an important tool for determining the suitable service life of the lubricant. A quality lab will give you the actual oxidation value as well, so, assuming you have a virgin benchmark, you know how far off the reservation you've gone during your OCI. This, coupled with viscosity and TBN can allow you to fine-tune the safe OCI length. @wwillson did this with his engine and found out the limit; found out where oxidation really started to drive up the visc.

 

[blueglide88]

OP, you can certainly do any OCI you want with your vehicle, but I have to ask
if you have ever watched the youtube video from CarCareNut about
OCI's in Toyotas?

 

[DirectRejection]

OP, you can certainly do any OCI you want with your vehicle, but I have to ask
if you have ever watched the youtube video from CarCareNut about
OCI's in Toyotas?

Yes indeed. I also watched and carefully listened to CCN's video specific to the new Corolla Cross.

It seems Toyota reverted to a mechanic thermostat vs an electronically controlled thermostat utilized in the same engine, with my previous UX. This tells me Toyota is managing the temperature control issue, while dealing with the emissions system obstacle.

I additionally went to open source information, as a mere consumer, to learn about the engineering in my engine. Remember, this is an engine with >40% thermal efficiency.

My X-factors are HPL and my driving conditions. Clean piston rings, my number one concern, should be there after 100s of thousands of miles.

 

[KEVINK0000]

OP- Is it the m20a-fks engine in your car?

FWIW-good job.

I am not an low vis or long drain devotee, (anti-both actually) but I enjoy reading about what you are doing.

 

[DirectRejection]

OP- Is it the m20a-fks engine in your car?

FWIW-good job.

I am not an low vis or long drain devotee, (anti-both actually) but I enjoy reading about what you are doing.

Yes. UX 250h is M20A-FXS

 

[KEVINK0000]

Yes. UX 250h is M20A-FXS

And as far as I can tell, the engine uses cast iron sleeves, is that correct?

 

[DirectRejection]

And as far as I can tell, the engine uses cast iron sleeves, is that correct?

Yes. Coolant jackets. DLC. etc.

 

[Oliveoil2]

DR, great post!! I’m loving your experiment with 0w-8. I might have missed it…., how much make up oil did you have in 20k?

 

[DirectRejection]

DR, great post!! I’m loving your experiment with 0w-8. I might have missed it…., how much make up oil did you have in 20k?

Thank you.
No makeup oil was needed.
The dipstick level was constant !

 

[DirectRejection]

View attachment 137974

Bump.

 

[himemsys]

I'm curious what another lab would get for TBN. I can't help but wonder with HPL analyzing their own oil there'd be some bias there. The TBN is almost unbelievable for 20k miles. It's higher than most oils start at.

 

[Shel_B]

I'm curious what another lab would get for TBN. I can't help but wonder with HPL analyzing their own oil there'd be some bias there. The TBN is almost unbelievable for 20k miles. It's higher than most oils start at.

Are you aware of the starting TBN? According to Dave, it's almost twice that number, >13.5.

 

[DirectRejection]

I'm curious what another lab would get for TBN. I can't help but wonder with HPL analyzing their own oil there'd be some bias there. The TBN is almost unbelievable for 20k miles. It's higher than most oils start at.

I neglected to answer Nathan's question.

In spite of the HPL letterhead, this is literally third party testing.

Wearcheck is in Cary, NC. HPL is in Manteno, IL.

Integrity is everything to both of these entities.

One can always read the 1000 page book on esters written by Dr. Rudnick, to figure out how they did it.

I will get back to you after 200,000 miles.

 

[himemsys]

Do we know what the Boron starts at in this oil? I've noticed that Boron depletes with use in oils, but I've never seen it actually get to 0.

Thanks for clarifying the HPL letterhead. So if I send Mobil 1 oil for Wearcheck to test, will I get Mobil 1 letterhead on my report?

Starting TBN of >13.5 is crazy impressive!

 

[JohnnyJohnson]

Wear metals to me seem a little high for a Toyota having had a 2004 Corolla the wear metals Iron was usually around 4 at 7000 plus miles and the aluminum usually around 2. Frankly I'd look strongly at uping your viscosity.

 

[JoelB]

Wear metals to me seem a little high for a Toyota having had a 2004 Corolla the wear metals Iron was usually around 4 at 7000 plus miles and the aluminum usually around 2. Frankly I'd look strongly at uping your viscosity.

You see he ran this oil 20k miles right?

 

[JoelB]

I had this engine (pretty sure?) in my 2020 corolla SE. I really liked it. Smooth power, never felt slow. And I was able to get high 40's mpg in just the right circumstances. I would happily get another one.

 

[MalibuRam65]

HPL put Amsoil to shame

 

[Pablo]

HPL put Amsoil to shame

How so ? I don't see any direct exact comparison??

 

[RDY4WAR]

I wouldn't say HPL put Amsoil to shame. They both make great products. HPL is just more willing to step outside the box. They're also more hands on and flexible with their customers with great transparency. That's my issue with Amsoil is the pamphlet regurgitation association (MLM dealer network), mostly comprised of people who just saw a quick side money opportunity and don't know anything about oil beyond the pamphlet, ends up confusing people and writing the brand off as a pyramid scheme. There's a few out there (like @Pablo) who do have knowledge in oil chemistry and applications, but the vast majority don't have a clue. I still see a lot of people on social media refer to them as "Scamsoil" because of the pyramid scheme appearance.