HPL Premium Plus - Reasonable OCI?

A

AdmiralYoda

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Jan 23, 2013
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2021 GMC Canyon with the 3.6L LGZ. 62k miles. The engine internals are clean, doesn't burn any oil and the LGZ is not known to be a heavy fuel diluter even though it is DI. I travel roughly 30k miles per year. 85% highway, 10% country roads, 5% city. No towing. Long trips, 45 miles each way to/from work.

I just switched to HPL's Premium Plus 5W-30 and I'm wondering what I should expect as a reasonable OCI. I don't want to stretch it to the limit but would like to get my moneys worth out of the oil.

I plan to get oil analysis done at 5k, 7.5k and 10k miles to see how the oil holds up. Most likely Oil Analyzers as I want TBN and fuel dilution.

So what is your guess on a reasonable OCI for the HPL Premium Plus?
 
A reasonable first interval for that oil IMO would be around 7,500 miles. Sample and go from there.

I ran Amsoil and Mobil 1 in the 3.6L for 5k mile intervals. The Amsoil UOA was 5,500 miles put on within a month's time. TBN was till 5.5 and viscosity/wear perfect.

Sample#1 was Mobil 1 EP
Sample#2 Amsoil SS

Both very different intervals in terms of usage. One was mixed driving the other all highway.

1740062051711.webp
 
@buster, who did your UOA? I like that report.

@Patman, this engine isn't known to be a fuel diluter but without a UOA on my engine I won't know for sure. I expect it won't be a problem.
 
There should be no guessing about using HPL (or others like Amsoil's top products) for extended OCIs.

You already indicated you're going to do UOAs. That is what should drive your decision. I don't understand why the need to "guess" about an OCI. Or is it your intention to make this into some form of gambling website; you're taking bets?


You don't need to UOA at 5k and 7.5k; that's just a waste of money. Start your UOAs at 15k miles; every 5k thereafter, so as to build some history. After that, you'll be able to reduce the UOA counts in successive OCIs once you develop your condemnation points.

I'm running HPL PCMO (their basic oil) in two of my cars, and I'm not doing UOAs until I get to 20k miles.
 
AdmiralYoda said:
@buster, who did your UOA? I like that report.

@Patman, this engine isn't known to be a fuel diluter but without a UOA on my engine I won't know for sure. I expect it won't be a problem.
Click to expand...
Oil Analyzers Inc. HPL, Amsoil and M1 EP are arguably the 3 best extended drain oils on the market.

I used HPL one time but didn't sample. My only concern with HPL is the very high sulphated ash levels. Little high for my liking otherwise no issue at all.
 
AdmiralYoda said:
2021 GMC Canyon with the 3.6L LGZ. 62k miles. The engine internals are clean, doesn't burn any oil and the LGZ is not known to be a heavy fuel diluter even though it is DI. I travel roughly 30k miles per year. 85% highway, 10% country roads, 5% city. No towing. Long trips, 45 miles each way to/from work.

I just switched to HPL's Premium Plus 5W-30 and I'm wondering what I should expect as a reasonable OCI. I don't want to stretch it to the limit but would like to get my moneys worth out of the oil.

I plan to get oil analysis done at 5k, 7.5k and 10k miles to see how the oil holds up. Most likely Oil Analyzers as I want TBN and fuel dilution.

So what is your guess on a reasonable OCI for the HPL Premium Plus?
Click to expand...
My 'guess' would be this:
I would expect that (with your described driving style) 7500 would be a safe bet, and 10K would take a UOA to make sure. I'm not sure if you have an OCI minder on your vehicle, if so what is it saying? I understand the desire to have some kind of idea what to expect on this run of fluid, hence the asking for guesses, but I'm pretty sure the 5K wont be an issue at all, and the 7.5K will be your sweet spot. Please let us know what your UOA's say when the times come.
 
@Propflux01 The oil minder in the Canyon starts at 7,500 miles and will adjust down based on idle time, tow/haul mode, high engine loads, etc. In my usage I've never seen it indicate anything other than an expected 7,500 miles. I'll probably stick to a UOA at 5k and 10k miles just for reference points.
 
If it were me...

I'd sample at 7500 and go from there. The 5k sample is absolutely a waste of money. However, I'm the guy running 10k intervals with a Ram Hemi and I was doing it before I started using HPL. As long as fuel is not a concern, I could see you easily going 15k plus.
 
This is almost the exact scenario I am in right now. 2023 Civic Type R ( 2.0 Turbo DI) . My commuting dynamics very similar to the OP. I'm currently at 6100 miles thru my first sump of HPL Premium Plus. I think I am going to run this OCI out to 6500 or so then do another 6500-7000 OCI before doing a UOA to see how oil holds up.
 
buster said:
Oil Analyzers Inc. HPL, Amsoil and M1 EP are arguably the 3 best extended drain oils on the market.

I used HPL one time but didn't sample. My only concern with HPL is the very high sulphated ash levels. Little high for my liking otherwise no issue at all.
Click to expand...
What are the SA levels and how do they compare to others?
 
drtyler said:
What are the SA levels and how do they compare to others?
Click to expand...
I don't know the levels but I'm guessing 1.4-1.5%.

Here is their No VII 0w20. Amsoil SS is 1.06 currently. This oil has 3x as much moly, more ZDP and significantly more Mg/ca. Whether that matters in a GDI engine I don't know. More metallics = more deposits. BUT, if the formulation is well balanced as HPL is, it should not be an issue with all the solvency. My .02.

1740069592422.webp


Amsoil SP 0w20 VOA

1740069660184.webp
 
AdmiralYoda said:
@Propflux01 The oil minder in the Canyon starts at 7,500 miles and will adjust down based on idle time, tow/haul mode, high engine loads, etc. In my usage I've never seen it indicate anything other than an expected 7,500 miles. I'll probably stick to a UOA at 5k and 10k miles just for reference points.
Click to expand...
Then that is where I would start my UOA. If you can at least do that safely, you can still keep easy remembrance numbers. 7500, 15000, 22500, etc. I guess 5k on my turbo GDI, and did my UOA then, it showed I could go further, but in my case, I decided to stay at 5K (as it did drop down a grade, even though metals were below minimums) simply because of TGDI, and easy to remember, and allows a bit of safety margin if I have to go over my OCI for some reason.
 
Thanks all for your help! I plan to do a UOA at 5k, then at 10k for this first OCI. This engine is not known for fuel dilution but I don't really know for sure and I'd rather have a reference point at 5k. Waste of money? Probably. But I'd like to know what my engine is doing for the first sample.

Then the next change it will be at 7.5k or 10k miles.
 
You could also go with HPL's fantastic Euro oils. Those are more LSPI friendly and have a lower SA level. But you still get the good base oils.
 
For contrast, my daughter’s 2022 Acadia has the same engine. It gets the cheapest api sp 10w40 and a cheap fram xg ph12750 every 5-6,000 kms.
I can do a complete oil and filter change for the price of one UOA.
Unfortunately the 3.6L has been discontinued in everything except the Blazer and a few Cadillac models.
 
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