2016 Toyota RAV4, HPL PCEO 10W20, 12,471 miles

The Critic

The Critic

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Last UOA sample was with Mobil 1 EP 0W20.

This was the first use of HPL in this vehicle. Oil was in service for 13 months, mix of city and highway.

1728024465487.webp
 
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Si less than half of the last run. Do you know what the virgin 100c viscosity is? No Tin this sample. Low wear numbers overall. I do wonder how many samplers Polaris has scared away due to "Severe" levels of oxidation.
 
This one is interesting. Would love to see how internals are.

In regard to HLP oxidation, the virgin oxidation value for PCMO is 23-25. What you have to look at is the change from virgin/used. HPL wear control is very good. TBN is as strong as I've ever seen in any oil. Just thinking out loud, I wonder when HPL starts to show signs of oxidation via oxidation value or KV, that the high solvency bases that are claimed to be used, and high detergents, keep any deposits/varnish/sludge from forming. In other words, maybe HPL is so capable of holding contaminants in suspension due to high detergents that it will oxidize a bit faster, but also keep the engine much cleaner.

Just a thought.
 
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The Critic said:
Question is, does that higher viscosity actually translate to improved protection?
Click to expand...

I don't know. Maybe not. To me the viscosity rise is not enough to bother me.
The question to me is , at what point do you condemn the oil due to viscosity, if the TBN is holding up, and the wear metals are still reasonable?
 
spasm3 said:
I don't know. Maybe not. To me the viscosity rise is not enough to bother me.
The question to me is , at what point do you condemn the oil due to viscosity, if the TBN is holding up, and the wear metals are still reasonable?
Click to expand...
That's why you need to go by oxidation value and get TAN as well as TBN. If oxidation value from virgin to used moves 20 points, then it's time to consider changing it.

HPL has so much TBN reserve that it's possible the oil won't get acidic despite the viscosity increase.
 
Sweet sample. I know the oxidation is high to begin with for HPL and it’s not alarming most the time even though it is flagged. Is that because of the different base oils used?
 
A 20 grade that absolutely does not shear...perfect.

Slug 'o moly.
Slug of magnesium.
Perfect.

As OP essentially stated, this 10W20 oil serves to mitigate possible oil consumption issues, famous with 2016 RAV4 2AR-FE engines, due to ring issues.

Thanks The Critic.
 
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The Critic said:
Last UOA sample was with Mobil 1 EP 0W20.

This was the first use of HPL in this vehicle. Oil was in service for 13 months, mix of city and highway.

View attachment 243567
Click to expand...
I’d say give it 2 more OCIs that way you can make sure there was no carryover from the Mobil. If you didn’t drain the HPL for this sample, I’d run it to at least the 18k that you did the M1.

Both runs look good, and Polaris isn’t doing themselves any credibility favors by arbitrarily flagging oxidation on every HPL oil they test…
 
SubieRubyRoo said:
If you didn’t drain the HPL for this sample, I’d run it to at least the 18k that you did the M1.
Click to expand...
It was drained and replaced with a mix of 4 qt HPL Euro No VII 5W20 and 1 qt of HPL Euro 5W40. I am targeting a 10K drain for this driver, any extra cushion is just insurance.
 
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