I’ve been running 5W-40 PPCMO for about three years now without any issues. The manufacturer recommends 5W-30, but I bumped it up based on advice from the HPL rep. 
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HPL Premium PCO 0W-20 4.8k mi; 2024 Mazda CX-90 I-6 Turbo 20.5k mi
- Thread starter cammyfive79
- Start date
wemay
Site Donor 2023
This looks perfectly fine. The Ca is neutralized by the over 500ppm Moly, so it has plenty LSPI protection for the Turbo D.I., and the wear metals look fine with this 0W-20 too. OP, you have nothing to worry about with this oil for the OCI you just did. Nothing.
Exactly. HPL in an I-6 T does not need to be "saved" by viscosity.
This needs to be understood.
I was thinking it was actually a bit low, but I have no idea how quickly these engines settle in from new.
Babied engines can take a long time to settle in.
I'm a slow learner. Signed, stubborn thickie.
I think this is correct in theory, but I also think a sanity check says those wear metal values are fantastic and the theoretical benefit of going to a lower TBN will disappear into nothingness in reality.
IN other words, you get the high TBN here for free-- the wear results are fantastic even with high TBN. Hard to argue that there's meaningful room for improvement, JMO.
Thanks, all, for the feedback. As mentioned, we’ll keep this vehicle another 2 years at most so I’m going to extend out to 7500 miles on what I’ve been using here. The tail end of that will be 1500 miles of interstate driving for our end of summer vacation so pretty easy. I’ll do another sample at that drain - really just for education and curiosity - and unless something goes sideways, stay on course with 7500 mile increments.
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I’m also curious how other drivers that use Brand X 0W-20 from a quick lube shop for 7500 miles or longer will hold up.
It’s funny that you think that Dr. Rudnick doesn’t know about LSPI and all its mitigating components, and their required levels. There’s a reason his name is on at least 5 reference manuals on formulating synthetic lubricants. Don’t worry your little head about HPL’s formulas.
Don’t ask questions that you don’t want to know the answers to… lol!
Oh excuse me for commenting; All bow down and shut up!
So explain the benefit of running a LL lubricant for 4.8K miles? Look again at the UOA ending TBN.
I stated in my first post that maybe HLP has an non LL oil formulation that the OP could investigate; then the OP stated that he might try an OTC XoM product. I responded try that in the spec SAE grade or 1up.
And do wear numbers matter or not? I don't particularly concern myself with them, but my driveway chem set produced one of the best UOA posted on this forum and backed it up with another one; Less than 1ppm/1K mi. total wear metals. A lowly frankenblend of off the shelf OLM spec oils run for 9000+ miles. The proof is in the pudding.
So is it all an illusion? Chasing rainbows? Splitting Hairs?
And take your snide jabs elsewhere, they are not appreciated.
- Arco
I have an oil in my shop with ~4800 ppm Ca that was used in a couple TGDI engines prone to LSPI. The oil also contains ~1200 ppm Zn/P, ~800 ppm Mo, and ~10% ester, which are all LSPI quenchers, and recorded no LSPI events. The same can't be said about those same engines on API SP oil off the shelf where occasional mild events were still recorded. API SP allows 5 LSPI events per iteration in Sequence IX.
God forbid though that we do a little harm to a catalytic converter at 400k miles from phosphorus and sulfur, because that's so much worse than lifting a ringland... right?
God forbid though that we do a little harm to a catalytic converter at 400k miles from phosphorus and sulfur, because that's so much worse than lifting a ringland... right?
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Yep. All of this. It was at 450k miles on my 2005 Tacoma 2.7L 4 cyl that I got a P0420 code.
4WD
$50 site donor 2025
What is that code?
Thanks, Ken. Your posts are always good for a chuckle, although your reply didn’t actually address the fact that HPL is aware of how to formulate oils that don’t create LSPI. RDY4WAR covered it for you in a pretty stark contrast to what most people may believe about LSPI, thanks to the fearmongering by API. Which may actually be a good thing, since it’s not likely to be able to just take the cheapest materials and slap together a API SP oil, even though it’s obviously not the cat’s behind on LSPI either. Take a deep breath, not everything is a personal attack.
4WD
$50 site donor 2025
If ya got good insurance - I can suggest a hotel where they remove them for free …
Why?
Are you having any unmentioned mechanical issues with it? Or perhaps you just don’t like the vehicle, overall?
And thanks for posting the UOA.
What........ LSPI concerns because of a high Ca. No way is 1021ppm a high Ca. That is on the very low side. The oil has Moly, some ester, Mg. and very very low Ca. All those are used to mitigate LSPI to date. Add to the fact most LSPI issues are 1.6 T and below turbos. Most 2.0 T barley come into the LSPI window.
A 1.6T 1 cylinder volume is .4/liter, 2.0T 1 cylinder volume is .5/liter and his full 3.3 liter motor has a .55/liter per cylinder. I would say it is a 99% non LSPI issue with his motor with this speced HPL oil.
I have actually had an LSPI event, I think, when my car was new. It did not destroy the engine. I thought it was a goner, a few seconds after the event. But the engine ran like normal after what felt like the car jumped 5 ft off the ground and landed. A very very violent event. To top it off I am astonished a Hyundai no less made it though that and it is still running to date, as a daily driver trashed on tuner car.
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