If I were to mix 4qts. of Valvoline 5w20 conventional + 2 qts. of Pennzoil Ultra 5W30, what wt. oil would this make, 5W25? Opinions?
VWB + PU
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5w23.33333333333333333333333333333333333333
Those two oils are so different, the oil gods will frown upon you. Im thinking like a 5w/22 (a thick 5w20). If the two oils were of the same make, it would take something close to 3 1/4 quarts of 5w30 and 2 3/4 of 5w20 to make a 5w/25 if there is such a thing.
KV100: 9.06cST
HTHS: 2.8cP
VI: 153
Looks like a thick synthetic-blend 5w-20 with an average viscosity index. NOACK is below average. The GREATEST it can be is 11.8%
HTHS: 2.8cP
VI: 153
Looks like a thick synthetic-blend 5w-20 with an average viscosity index. NOACK is below average. The GREATEST it can be is 11.8%
No such thing. It's either 20,30,40 or 50. (i'm ignoring the new spec which may include a 16.) You can make a thick 20 or a thin 30, but there is no 22 or 25 or whatever else. You would most likely end up with a thick 20 grade. You can use a viscosity calculator BIOG has here: http://www.bobistheoilguy.com/viscosity-calculator/
Go to the web pages for those oils and get their PDS, plug in your numbers and you'll have your answer.
http://www.bobistheoilguy.com/viscosity-charts/
Go to the web pages for those oils and get their PDS, plug in your numbers and you'll have your answer.
http://www.bobistheoilguy.com/viscosity-charts/
Originally Posted By: tinmanSC
No such thing. a thick 20 or a thin 30, but there is no 22 or 25 or whatever else.
Of course you are technically correct. But why not use this little metric to give a someone a "seat of the pants" feel for a viscosity? Does it really hurt to "ball park" a number like 25 or 22? It does get the point across. Also, they have just come up with a "16", so can anyone really say a "25" won't officially exist at some point?
I, and most others, get his point, as unofficial as it may be...
No such thing. a thick 20 or a thin 30, but there is no 22 or 25 or whatever else.
Of course you are technically correct. But why not use this little metric to give a someone a "seat of the pants" feel for a viscosity? Does it really hurt to "ball park" a number like 25 or 22? It does get the point across. Also, they have just come up with a "16", so can anyone really say a "25" won't officially exist at some point?
I, and most others, get his point, as unofficial as it may be...
Personally, I mix 1 quart Wesson Oil, 2 quarts of Kaopectate, half a boiled egg and a dash of paprika, run only through over sized AC Delco Ecore filters. Anything else will cause any motor to seize within 7500 miles. I read it on the internet.
Originally Posted By: jfking106
Personally, I mix 1 quart Wesson Oil, 2 quarts of Kaopectate, half a boiled egg and a dash of paprika, run only through over sized AC Delco Ecore filters. Anything else will cause any motor to seize within 7500 miles. I read it on the internet.
X 100
Personally, I mix 1 quart Wesson Oil, 2 quarts of Kaopectate, half a boiled egg and a dash of paprika, run only through over sized AC Delco Ecore filters. Anything else will cause any motor to seize within 7500 miles. I read it on the internet.
According to my valvoline rep, they get a lot of their base oils from Shell.
Originally Posted By: BlueOvalFitter
If I were to mix 4qts. of Valvoline 5w20 conventional + 2 qts. of Pennzoil Ultra 5W30, what wt. oil would this make, 5W25? Opinions?
You probably would end up with a 5w20 on the thick side. The Widman calculator helps greatly with this:
Widman Viscosity Calculator
If I were to mix 4qts. of Valvoline 5w20 conventional + 2 qts. of Pennzoil Ultra 5W30, what wt. oil would this make, 5W25? Opinions?
You probably would end up with a 5w20 on the thick side. The Widman calculator helps greatly with this:
Widman Viscosity Calculator
Originally Posted By: gfh77665
Of course you are technically correct. But why not use this little metric to give a someone a "seat of the pants" feel for a viscosity? Does it really hurt to "ball park" a number like 25 or 22? It does get the point across. Also, they have just come up with a "16", so can anyone really say a "25" won't officially exist at some point?
I doubt they'd want to subdivide the 30 grade, unless they revamp the entire SAE viscosity system. After all, the 30 grade has the lighter ILSAC rated versions, along with substantially thicker HDEOS and A3/B3 type 30s.
If it says GF-5 or A1/B1 A5/B5, then it's a thin 30. If it says A3/B3 A3/B4 or CJ-4, it will be a thick 30.
Of course you are technically correct. But why not use this little metric to give a someone a "seat of the pants" feel for a viscosity? Does it really hurt to "ball park" a number like 25 or 22? It does get the point across. Also, they have just come up with a "16", so can anyone really say a "25" won't officially exist at some point?
I doubt they'd want to subdivide the 30 grade, unless they revamp the entire SAE viscosity system. After all, the 30 grade has the lighter ILSAC rated versions, along with substantially thicker HDEOS and A3/B3 type 30s.
If it says GF-5 or A1/B1 A5/B5, then it's a thin 30. If it says A3/B3 A3/B4 or CJ-4, it will be a thick 30.
Originally Posted By: jfking106
Personally, I mix 1 quart Wesson Oil, 2 quarts of Kaopectate, half a boiled egg and a dash of paprika, run only through over sized AC Delco Ecore filters. Anything else will cause any motor to seize within 7500 miles. I read it on the internet.
They can't put anything on the internet that isn't true.
Personally, I mix 1 quart Wesson Oil, 2 quarts of Kaopectate, half a boiled egg and a dash of paprika, run only through over sized AC Delco Ecore filters. Anything else will cause any motor to seize within 7500 miles. I read it on the internet.
They can't put anything on the internet that isn't true.
Originally Posted By: Garak? [/quote
I doubt they'd want to subdivide the 30 grade, unless they revamp the entire SAE viscosity system.
I am not suggesting "they" subdivide or revamp the official grading system. I am suggesting though that a number like "25" or "22" be accepted on an informal basis, which gives a "ballpark" idea where a visc. really is at, for discussion purposes only.
Currently, when someone does say "25" or simular, its immeadiatly challenged.
I doubt they'd want to subdivide the 30 grade, unless they revamp the entire SAE viscosity system.
I am not suggesting "they" subdivide or revamp the official grading system. I am suggesting though that a number like "25" or "22" be accepted on an informal basis, which gives a "ballpark" idea where a visc. really is at, for discussion purposes only.
Currently, when someone does say "25" or simular, its immeadiatly challenged.
Originally Posted By: BlueOvalFitter
If I were to mix 4qts. of Valvoline 5w20 conventional + 2 qts. of Pennzoil Ultra 5W30, what wt. oil would this make, 5W25? Opinions?
It would make a waste of two quarts of Ultra.
These oils have entirely different add packs.
I don't think you'd enhance the performance of either by mixing the two.
WRT grade, the result will be a thick twenty.
If I were to mix 4qts. of Valvoline 5w20 conventional + 2 qts. of Pennzoil Ultra 5W30, what wt. oil would this make, 5W25? Opinions?
It would make a waste of two quarts of Ultra.
These oils have entirely different add packs.
I don't think you'd enhance the performance of either by mixing the two.
WRT grade, the result will be a thick twenty.
Just to clarify my above post a little, I realize there is no in between weights and wont be, as mentioned by GFH this was just an informal stab at what it could be called if we had tweener weights. The reason I mentioned mixing two of the same makes was more about being able to more accurately guess what the final weight might be than compatibility. My thinking was PU is considered on the thick side of 30's and Valvoline conventional is on the thin side of 30's so it would be more difficult to guage what you will end up with. However, this thinking (or over-thinking) was completely flawed. With the Widman all you need is the cst of the two oils. As far as mixing the two, I am sure it will make a very serviceable oil, is it optimum? I don't know.
Originally Posted By: gfh77665
Currently, when someone does say "25" or simular, its immeadiatly challenged.
Ahh, I see your point. But in a rigorous fashion, it's kind of meaningless, and that's where the problem arises. Those who are picky about the wording know the limitations of the SAE grading system and they probably would suggest that even informally muddying the borders makes things less clear, not more clear. SAE grades are misleading enough without treating the definition in a less rigorous fashion.
Take a hypothetical, informal 5w-22 or 5w-25. That tells me nothing. Is it a 5w30 that barely squeaks by? Or is it one of the heavier 5w-20 grades?
There's a reason that HTHS and VI are important. At least you get some idea of the oil's behaviour over a certain range of temperatures and can plot a viscosity curve.
Currently, when someone does say "25" or simular, its immeadiatly challenged.
Ahh, I see your point. But in a rigorous fashion, it's kind of meaningless, and that's where the problem arises. Those who are picky about the wording know the limitations of the SAE grading system and they probably would suggest that even informally muddying the borders makes things less clear, not more clear. SAE grades are misleading enough without treating the definition in a less rigorous fashion.
Take a hypothetical, informal 5w-22 or 5w-25. That tells me nothing. Is it a 5w30 that barely squeaks by? Or is it one of the heavier 5w-20 grades?
There's a reason that HTHS and VI are important. At least you get some idea of the oil's behaviour over a certain range of temperatures and can plot a viscosity curve.
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