1qt HPL EC - 4qt PUP oil filter @6k miles

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Just did an oil change on my 2007 xterra. It has ~189k on it. Ran 1qt of HPL EC for 6k miles to prepare to switch it fully to hpl premium passenger car oil at Dave's recommendation. I've historically used penzoil platinum high milage and PUP exclusively and changed it at anywhere from 5-12k miles so I wasn't expecting the cleaner to do a lot, I think my engine is pretty clean but I haven't been under the valve covers yet, not doing that till they leak. My commute is 70 miles interstate every day so I'm going to try to push this hpl beyond 15k and see what happens. I'll probably do a uoa at 10k and go from there. Overall though the filter from the previous change looks pretty clean.

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Yeah I would say chances are that your engine is pretty clean using the Pennzoil Ultra/Pennzoil Platinum. I know when I switched from Mobil1 EP to Amsoil SS, I cut open my oil filter halfway through the run and my filter looked similar to yours.
 
Just did an oil change on my 2007 xterra. It has ~189k on it. Ran 1qt of HPL EC for 6k miles to prepare to switch it fully to hpl premium passenger car oil at Dave's recommendation. I've historically used penzoil platinum high milage and PUP exclusively and changed it at anywhere from 5-12k miles so I wasn't expecting the cleaner to do a lot, I think my engine is pretty clean but I haven't been under the valve covers yet, not doing that till they leak. My commute is 70 miles interstate every day so I'm going to try to push this hpl beyond 15k and see what happens. I'll probably do a uoa at 10k and go from there. Overall though the filter from the previous change looks pretty clean.

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Which filter is this? just curious.
 
Anyone know why 20% and 1:5 are used as equivalent?
Is this a math question? 20% and 1:5 are equivalent because 1 divided by 5 is 0.20...which is 20%, OR are you asking why 20% is the suggested concentration? That would be because Dave said so (presumably due to results of testing the cleaner's characteristics so as not to be too strong in cleaning or perhaps not be too hard on seal materials).
 
Is this a math question? 20% and 1:5 are equivalent because 1 divided by 5 is 0.20...which is 20%, OR are you asking why 20% is the suggested concentration? That would be because Dave said so (presumably due to results of testing the cleaner's characteristics so as not to be too strong in cleaning or perhaps not be too hard on seal materials).

From the HPL website:
  • Use (1) quart Engine Cleaner to (5) quarts Motor Oil
Not 1 quart EC per 5 quarts capacity

It's 16.7% vs 20% so not a big deal but yeah.

Unless motor oil is unlike cooking

https://openwa.pressbooks.pub/culinarymath/chapter/recipe-ratios/

Searching around it's a confusion of dilution ratio vs dilution factor. What HPL intends is somewhat confusing as they've stated 20% (dilution factor) in emails on here but the website is saying 1 to 5 (dilution ratio).
 
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You have folks claiming to run mobil 1 but then see tons of carbon in their filter after hpl. Then you have op that has almost a spotless filter coming out. Imo, hpl = the new autorx
 
From the HPL website:
  • Use (1) quart Engine Cleaner to (5) quarts Motor Oil
Not 1 quart EC per 5 quarts capacity

It's 16.7% vs 20% so not a big deal but yeah.

Unless motor oil is unlike cooking

https://openwa.pressbooks.pub/culinarymath/chapter/recipe-ratios/

Searching around it's a confusion of dilution ratio vs dilution factor. What HPL intends is somewhat confusing as they've stated 20% (dilution factor) in emails on here but the website is saying 1 to 5 (dilution ratio).
I thought it said to substitute 1 quart of Cleaning Oil out of the 5 quarts that is typical of a sump volume.
 
You have folks claiming to run mobil 1 but then see tons of carbon in their filter after hpl. Then you have op that has almost a spotless filter coming out. Imo, hpl = the new autorx
1/8 and then 2/8 EC30 put nothing in my filter behind Mobil 1 - so figured I didn’t need HPL oil - and now on 2nd fill of VRP …
 
I thought it said to substitute 1 quart of Cleaning Oil out of the 5 quarts that is typical of a sump volume.

I only have experience cooking/baking and not working in a lab so I take it like bread, 5:3 = 5 parts flour to 3 parts water.

I ask because I have some EC and was doing the math but remember seeing 20% around here. They may mean 20% but the wording could be better.

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1/8 and then 2/8 EC30 put nothing in my filter behind Mobil 1 - so figured I didn’t need HPL oil - and now on 2nd fill of VRP …
Imo you have a much better chance at cleaning stuff up with vrp. I haven’t seen any hard evidence of hpl doing anything beyond what a decent off the shelf oil like Mobil 1 can do in terms of cleaning
 
Imo you have a much better chance at cleaning stuff up with vrp. I haven’t seen any hard evidence of hpl doing anything beyond what a decent off the shelf oil like Mobil 1 can do in terms of cleaning
I was mainly wanting to verify that Mobil 1 was keeping it clean - including the things that are hard to see like pistons …
I’ll go back to M1 or PP after this run - already have them …
 
Is this a math question? 20% and 1:5 are equivalent because 1 divided by 5 is 0.20...which is 20%, OR are you asking why 20% is the suggested concentration? That would be because Dave said so (presumably due to results of testing the cleaner's characteristics so as not to be too strong in cleaning or perhaps not be too hard on seal materials).
Had you gotten past fourth grade, you would have learned that a ratio is not quite the same as a fraction. A one to five ratio contains five units of one material and one unit of another. That would be a total of six units.
 
Had you gotten past fourth grade, you would have learned that a ratio is not quite the same as a fraction. A one to five ratio contains five units of one material and one unit of another. That would be a total of six units
5 quart sumps are commonplace, and I've read discussions where the recommendation was substitution of one of the typical 5 quarts with 1 quart of EC, which would be a 20% concentration. Based upon those discussions, using a higher reasoning power than what a typical fourth-grader might possess, the inference that substitution of one quart EC for one of the typical 5 quarts isn't unreasonable. Obviously, since the wording is as reported, 16.7% would be the correct fraction if it were 1 quart of EC PLUS 5 quarts of other oil. I'll bet the inference is correct.
 
5 quart sumps are commonplace, and I've read discussions where the recommendation was substitution of one of the typical 5 quarts with 1 quart of EC, which would be a 20% concentration. Based upon those discussions, using a higher reasoning power than what a typical fourth-grader might possess, the inference that substitution of one quart EC for one of the typical 5 quarts isn't unreasonable. Obviously, since the wording is as reported, 16.7% would be the correct fraction if it were 1 quart of EC PLUS 5 quarts of other oil. I'll bet the inference is correct.
Yeah, it definitely reads as 1qt EC + 5 qts oil. For 6 total. Or your 16.7% figure. But as the other poster commented, I don't think 1 + 4 for a total of 5 would hurt anything, plus you could fit it all in one 5qt oil jug (after pouring a quart into a separate container for room, of course). I bet you could actually then squeeze another .5 quart in addition, bringing you even closer to the recommended ratio. Just shake real well to blend, so you know you're pouring in what you intend to pour in. Cheers!
 
After reading through 20 pages of the stickied thread in the additives forum people start talking about the ratio but interestingly HPL doesn't chime in there.


Huh, it should link to page 20 but doesn't.
 
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