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An Article on 2w-50 vs. 0w-40 Motor Oils

This is a discussion on An Article on 2w-50 vs. 0w-40 Motor Oils within the General RZR Discussion forums, part of the General RZR category; I've read a lot of controversy on here regarding "what weight oil is the Polaris PS-$?" and "which is better, 0w-40 or 2w-50" and so ...


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Old April 29th, 2011, 12:26 PM
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An Article on 2w-50 vs. 0w-40 Motor Oils

I've read a lot of controversy on here regarding "what weight oil is the Polaris PS-$?" and "which is better, 0w-40 or 2w-50" and so on and so on.

I'm not an Amsoil seller, but I use their stuff and get their magazine. Within an article related to powersports, this question was asked and answered. Hopefully this helps a little clearing some of the oil myths surrounding RZR's..............

"Why does Amsoil recommend Formula 4-stroke Powersports oil (0w-40) in applications that call for OEM-labeled 50 weight oils?"

"While Polaris Synthetic PS-4 Plus and Arctic Cat Synthetic ACX motor oils fall within a 50 weight viscosity range directly from the bottle, both quickly shear down into the 40 weight range. Amsoil subjected both oils along with Formula 4-stroke Power Sports Oil to ASTM D-7109 shear stability testing, and after only 30 passes, both OEM labeled oils sheared out of their starting viscosity grades. After only 90 passes, the Polaris oil lost over 33% of its viscosity while the Arctic Cat oil lost 30 percent. The Amsoil product , however, lost less than 5 percent. Its exceptional shear stability allows it to protect high rpm atv engines as well as or better than both 50 weight oils."

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reference: amsoil magazine preferred customer edition, april 2011, page 9
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  #2  
Old April 30th, 2011, 04:57 PM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

Quote: Originally Posted by grant22 View Post
I've read a lot of controversy on here regarding "what weight oil is the Polaris PS-$?" and "which is better, 0w-40 or 2w-50" and so on and so on.

I'm not an Amsoil seller, but I use their stuff and get their magazine. Within an article related to powersports, this question was asked and answered. Hopefully this helps a little clearing some of the oil myths surrounding RZR's..............

"Why does Amsoil recommend Formula 4-stroke Powersports oil (0w-40) in applications that call for OEM-labeled 50 weight oils?"

"While Polaris Synthetic PS-4 Plus and Arctic Cat Synthetic ACX motor oils fall within a 50 weight viscosity range directly from the bottle, both quickly shear down into the 40 weight range. Amsoil subjected both oils along with Formula 4-stroke Power Sports Oil to ASTM D-7109 shear stability testing, and after only 30 passes, both OEM labeled oils sheared out of their starting viscosity grades. After only 90 passes, the Polaris oil lost over 33% of its viscosity while the Arctic Cat oil lost 30 percent. The Amsoil product , however, lost less than 5 percent. Its exceptional shear stability allows it to protect high rpm atv engines as well as or better than both 50 weight oils."

See, who says I can't be productive on the crapper!


reference: amsoil magazine preferred customer edition, april 2011, page 9
I still find it hard to believe polaris came up with a engine that by design needs an non standard viscosity (2W-50) oil. Oil viscosity is standardized in the industry and to think that polaris contracts for a non standard special viscosity oil just does not make sense.

Where does the 2W-50 claim come from, I don't see it labled as such.
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Old May 1st, 2011, 12:04 PM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

I agree, it is weird and it seems like there's no doc'ing of it anywhere. The article doesn't prove POPO oil is 2w-50, but does say it's a 50w oil "from the bottle."

More importantly though, the article is saying it's not REALLY a 50w oil. They're saying it mechanically shears down 33% essentially making it a 34w oil within 90 piston passes. Pretty much immediately the oil is NOT 50w. As far as the "2w" part of the POPO oil, that's just a joke and I think it's a scare tactic, but that's just my opinion.
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Old May 1st, 2011, 01:20 PM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

Geez, an Amsoil published magazine saying that its product had less breakdown than other products...... what a shocker.
On top of that, I see such a huge wave of engine failures due to oil viscosity breakdown due to one brand vs another. NOT!!!!!
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Old May 1st, 2011, 01:30 PM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

Why doesnt Amsoil build ATV's if they know better than OEM? I can see how someone may want to use different products in their machines but I cant figure out how some folks think OEM products are going to hurt it.
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Old May 1st, 2011, 04:32 PM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

Quote: Originally Posted by chopperbill View Post
Why doesnt Amsoil build ATV's if they know better than OEM? I can see how someone may want to use different products in their machines but I cant figure out how some folks think OEM products are going to hurt it.
Who said OEM oil will hurt the machine? I'm starting to wonder if the CEO of AMSOIL boned some of your wives...........I've never seen people display the angst they do toward Amsoil. Whatever.
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Old May 1st, 2011, 05:15 PM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

Quote: Originally Posted by grant22 View Post
Quote: Originally Posted by chopperbill View Post
Why doesnt Amsoil build ATV's if they know better than OEM? I can see how someone may want to use different products in their machines but I cant figure out how some folks think OEM products are going to hurt it.
Who said OEM oil will hurt the machine? I'm starting to wonder if the CEO of AMSOIL boned some of your wives...........I've never seen people display the angst they do toward Amsoil. Whatever.
I just asked my wife, she said no.
I am not Anti-Any Brand. After 40 plus years in the engine business, I can tell you the only worry on the viscosity issues are what is in the OEM manual that came with the product. Avoid 10 & 20 low end numbers in very cold climates. Avoid a major spread between the high and low numbers. (to my knowledge, NO ONE makes 10w50 conventional motor oil anymore. Bad things happened)
Popo seems to be sticking to their guns on this one. I'm not sure why, but I for one don't have the time to second guess their reasons for 2-50. Nor do I have the money to replace an engine if 10w30 or 20w50 wasn't up to the task.
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Old May 1st, 2011, 05:25 PM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

Working for an oil company for 32 years has given me a couple of insights into the making of motor oil and one other thing but I forgot that one. I also ride a Harley and stayed at a Holiday Inn Express laast night. Years ago we did operate a motor oil processing plant but it went the way of the dinosaur.

Harley does this very thing with their oils so use Polaris branded oil with one caveat. They have their oil made by the cheapest bidder. Period. Polaris sets the standard they want and send out the information to oil manufacturers and the one with the closest to what they want AND the cheapest price gets the nod. For the record, I do use Polaris oil in my RZR at least until I can find Mobile 1 in the same weight. (it exists, just not around here) or Royal Purple.

So, do you want to use the best oil you can find or oil from the cheapest bidder?
Thats the choice we have to make. I'm not even hinting that you're wrong or right using Polaris oil, just keep in mind that lubricating fluids with a manufacturers name on it are usually the cheapest oil to make in that grade.
Oh and for anyone who still thinks Polaris is in the oil refining business? thats funny right there I don't care who ya are.

Just my 2 cents worth.
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Old May 1st, 2011, 05:30 PM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

Quote: Originally Posted by chopperbill View Post
Why doesnt Amsoil build ATV's if they know better than OEM?
Hey Chopper, the same reason Polaris doesn't make oil!

Rmr Man, that was funny. Send the wife our best!

Boys, I didn't post this to start an Oil pissing contest. Use what you want, I don't give a shat.

I just read an article that gave some evidence what weight the POPO oil actually is.

If you don't like it, don't read it. Better yet, use whatever oil you want.

sunbitch!

Last edited by grant22; May 1st, 2011 at 06:22 PM.
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Old May 1st, 2011, 06:09 PM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

I have worked for an oil company for the past 20 years (don't blame me for the current prices!) and I would have to challenge the 2w claim on Popo's bottle. No refinery is going to make a run of oil at that spec for something as limited as a powersport "dealer only" item. It just would not make financial sense at all.
Maybe it's like the guy who pours Seagram's 7 into a Johnny Walker Blue Label bottle and his friends think it's the smoothest stuff they ever tried?
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Old May 1st, 2011, 06:35 PM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

Quote: Originally Posted by grant22 View Post
Quote: Originally Posted by chopperbill View Post
Why doesnt Amsoil build ATV's if they know better than OEM?
Hey Chopper, the same reason Polaris doesn't make oil!

Rmr Man, that was funny. Send the wife our best!

Boys, I didn't post this to start an Oil pissing contest. Use what you want, I don't give a shat.

I just read an article that gave some evidence what weight the POPO oil actually is.

If you don't like it, don't read it. Better yet, use whatever oil you want.

sunbitch!
Ya, she laughed and said thanks for asking! I actually use Mobil 1 0W-40 in mine, but I do use genuine Popo oils in all of the gear cases. I am willing to bet money, that after 50 hours of use, you could burn any multi-vis oil in the 10 to 40 range and get away with it. It is a water cooled motor, so with all things working as designed, we will stay below that feared 245 degree range. I own a Nissan sentra, a Silverado, a Mopar T&C, a Pontaic Vibe, a GMC Safari and a Ford F-150. None of them use the same oil filter, and only 2 of them spec the same weight oil. Makes it a real pain in the a$$ to keep track of. I actualy had to print a chart of weights, capacities, quantities, filter part numbers and wrench sizes for them to make my life easier! BUT, I use whatever oil it says in the manual! Lets me sleep better at night.
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Old May 2nd, 2011, 04:37 AM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

Last yr. I used 25 year old circa 1985 Quaker State 10W40 oil in my wife's Pontiac Grand Am that is speced for 5W30! I ran it 3,000 miles and sent a used oil sample to Blackstone for an analysis. It came back brilliant! They said it could have been ran a few thousand more miles w/o a problem. Blew a few minds on www.bobistheoilguy.com forum. I do use Amsoil 0-40 Powersports oil in my rzr BTW. When that runs out I've got some full synthetic Mobil 1 10W40 High Mileage that I got on sale at Walmart for $9.00 a 5 qt. jug I'll use.
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Old May 2nd, 2011, 10:47 PM
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Re: An Article on 2w-50 vs. 0w-40 Motor Oils

--
I don't want to be in an oil pissing contest either (what?), but of course Polaris uses the cheapest oil that fits their specs--what, do you think they say "Hey, let's use XXX company because we can pay them more money"? And what are the chances that "their" oil is actually "2" weight? Nobody I've ever read about makes that weight. But if it's not "their" brand, it gives them one more "out" in case of responsibility in a suit or repair bill from a customer.

I use Amsoil because it's actually made to work in small engines in certain conditions (not true of 99% of other oils--most are designed for auto or diesel engines), and they actually put their own name on the bottle--don't farm out to the cheapest bidder. You have to look at the facts along with trusting some companies sometimes.

Of course, some people are happy to use whatever is cheapest or what they have used for years. So if it makes them happy, good for them. Although when I buy a vehicle and the owner says "I just use the cheapest oil I can buy," I'm not real enthusiastic--I wonder why that is?

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