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10w-40 or 20w-50?

This is a discussion on 10w-40 or 20w-50? within the RZR 900 Engine forums, part of the Technical category; Ok so I want to try something different than the Polaris mystery weight oil. With a turbo setup that has extensive work done to it ...


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  #1  
Old March 31st, 2013, 05:38 AM
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10w-40 or 20w-50?

Ok so I want to try something different than the Polaris mystery weight oil.

With a turbo setup that has extensive work done to it and will be pushing quite a bit of Hp, which will have a bi product of HEAT, I want to go with 20-50.

My concern is the thicker oil has a harder time flowing into and around tight tolerances. I know when it gets really hot, it will flow, but on the initial start up and until it gets real hot, perhaps I am not protecting this engine as much as I need to.

If I use 10-40 Im sure ill be better protected on start ups and until it gets hot but Im concerned that it will not protect like the 20-50 when it gets good and hot. Especially with it flowing through the turbo.

BTW: This setup runs summer months 70*-95*

Can I get please have some opinions here from people with experience?
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  #2  
Old March 31st, 2013, 05:58 AM
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Re: 10w-40 or 20w-50?

i've had good luck with castrol 20/50 semi synthetic during warmer temperatures
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Old March 31st, 2013, 06:16 AM
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Re: 10w-40 or 20w-50?

I emailed Amsoil and they recommended their 20-50 synthetic motorcycle oil. $12 a qt

I looked into that Joe Gibbs oil. WoW... the XP9 (ironic) looks like what i may consider from them but is like $20 a qt....dayummmm
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Old March 31st, 2013, 06:23 AM
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Re: 10w-40 or 20w-50?

That's why the Polaris oil is 2W-50 I read it in an owners or service manual somewhere. Just run that.
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Old March 31st, 2013, 06:25 AM
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Re: 10w-40 or 20w-50?

Quote: Originally Posted by KingR View Post
I emailed Amsoil and they recommended their 20-50 synthetic motorcycle oil. $12 a qt

I looked into that Joe Gibbs oil. WoW... the XP9 (ironic) looks like what i may consider from them but is like $20 a qt....dayummmm
pm me and I will show you how to save about $3.00 a quart on the Amsoil.
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Old March 31st, 2013, 06:26 AM
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Re: 10w-40 or 20w-50?

Quote: Originally Posted by glockholiday View Post
That's why the Polaris oil is 2W-50 I read it in a service manual somewhere.


I need to do more reading...lol

Thank you for telling us that

Sounds like that oil is good for a broad range of enviroments

Im not using it in cold climates. Its always in warm climates (when using it)
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Old March 31st, 2013, 06:34 AM
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Re: 10w-40 or 20w-50?

I need to go read up on the exact rating meanings on engine oil. Isnt the first number realitive to hows it flows and the second number relative to how much it protects to? or something like that....

Thing is, you spend 10K on an engine build and you just want to use the absolute BEST oil and oil weight you can put in there. Im sure many oils will work, but I would like to put one of the best in there. This subject always has alot of different opinions I know.
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Old March 31st, 2013, 07:02 AM
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Re: 10w-40 or 20w-50?

I understand your concerns...

I am not a chemical engineer, but a friend of mine is, at Mobil.
We have discussed oils Ad nauseam, till he fianly got it thru my head...

The new breed of synthetics are not built the same, or blended the same as the old dino oils. These newer synthetics do not meet the oil spec requirements the same ways.This is important to understand.

A top shelf synthetic oil, like 0-50 racing Mobil1, or any other top shelf brand, is created from a very high quality base stock of 0w. It does not get thicker as it heats up.
Nope, it does not increase viscosity at all.
What it does do, is it passes all the API requirements and test criteria of a 50w oil, still being a 0w oil. Yup, a 0w oil that meets or beats all the tests required to be labeled 0w-50. Thats how good these oils are.

So I ask you, why use a 20w-50 oil that will not get thru oil galleries as quickly as a 0w-50 (especially when cold)..?
Why not use a 0w-50 that beats all of the specs of the 20w-50 cold or hot..?

It has similar additive qualities/quantities as the Polaris oils.
actually it has slightly more zinc and Phosphorus anti-wear additives. Most all other oils have substantially less... check it out.

Mobil 1 Racing 0W-50
Phosphorus Level, PPM1750
Zinc Level, PPM1850


IMO, 0w-50, its a win win no matter how you look at it...

jmo
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Old March 31st, 2013, 07:09 AM
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Re: 10w-40 or 20w-50?

Quote: Originally Posted by allcool View Post
I understand your concerns...

I am not a chemical engineer, but a friend of mine is, at Mobil.
We have discussed oils Ad nauseam, till he fianly got it thru my head...

The new breed of synthetics are not built the same, or blended the same as the old dino oils. These newer synthetics do not meet the oil spec requirements the same ways.This is important to understand.

A top shelf synthetic oil, like 0-50 racing Mobil1, or any other top shelf brand, is created from a very high quality base stock of 0w. It does not get thicker as it heats up.
Nope, it does not increase viscosity at all.
What it does do, is it passes all the API requirements and test criteria of a 50w oil, still being a 0w oil. Yup, a 0w oil that meets or beats all the tests required to be labeled 0w-50. Thats how good these oils are.

So I ask you, why use a 20w-50 oil that will not get thru oil galleries as quickly as a 0w-50 (especially when cold)..?
Why not use a 0w-50 that beats all of the specs of the 20w-50 cold or hot..?

It has similar additive qualities/quantities as the Polaris oils.
actually it has slightly more zinc and Phosphorus anti-wear additives. Most all other oils have substantially less... check it out.

Mobil 1 Racing 0W-50
Phosphorus Level, PPM1750
Zinc Level, PPM1850


IMO, 0w-50, its a win win no matter how you look at it...

jmo
I get it, I got it, and I thank you Fred.

Best of all I can go down to my local Pep Boys and get a little for the next oil change without having to order it
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Old March 31st, 2013, 07:18 AM
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Re: 10w-40 or 20w-50?

Quote: Originally Posted by allcool View Post
I understand your concerns...

I am not a chemical engineer, but a friend of mine is, at Mobil.
We have discussed oils Ad nauseam, till he fianly got it thru my head...

The new breed of synthetics are not built the same, or blended the same as the old dino oils. These newer synthetics do not meet the oil spec requirements the same ways.This is important to understand.

A top shelf synthetic oil, like 0-50 racing Mobil1, or any other top shelf brand, is created from a very high quality base stock of 0w. It does not get thicker as it heats up.
Nope, it does not increase viscosity at all.
What it does do, is it passes all the API requirements and test criteria of a 50w oil, still being a 0w oil. Yup, a 0w oil that meets or beats all the tests required to be labeled 0w-50. Thats how good these oils are.

So I ask you, why use a 20w-50 oil that will not get thru oil galleries as quickly as a 0w-50 (especially when cold)..?
Why not use a 0w-50 that beats all of the specs of the 20w-50 cold or hot..?

It has similar additive qualities/quantities as the Polaris oils.
actually it has slightly more zinc and Phosphorus anti-wear additives. Most all other oils have substantially less... check it out.

Mobil 1 Racing 0W-50
Phosphorus Level, PPM1750
Zinc Level, PPM1850


IMO, 0w-50, its a win win no matter how you look at it...

jmo

That maybe all and good but why does Amsoil, the first to make auto synthetics, have so many different blends and weights to meet many different needs? Must be a very good reason to have so many different blends.
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Old March 31st, 2013, 07:22 AM
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Re: 10w-40 or 20w-50?

Quote: Originally Posted by KingR View Post
I get it, I got it, and I thank you Fred.

Best of all I can go down to my local Pep Boys and get a little for the next oil change without having to order it
Thats the only problem, you can't usually get Mobil1 racing 0w-50 at your local Pep Boys auto parts. You can order it at some of them though.

The problem is, Mobil1 Racing's high antiwear additive package, uses Phosphorus Level, PPM1750
Zinc Level, PPM1850
this, over time, will destroy a catalytic converter used on road cars. Thats why they have a disclaimer, something like,
'not for road use on cars with catalytic converters'.

Lucky for us, no catalytic converter on a RZR.
Thats why Polaris uses a similar additive package as Mobil1 0w-50 racing oil.
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Last edited by allcool; March 31st, 2013 at 07:30 AM.
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Old March 31st, 2013, 07:27 AM
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Re: 10w-40 or 20w-50?

Quote: Originally Posted by sandblster View Post

That maybe all and good but why does Amsoil, the first to make auto synthetics, have so many different blends and weights to meet many different needs? Must be a very good reason to have so many different blends.
Amsoil is a great oil, no doubt.
I've used it for a long time...

Yes, that is a good question, why are there different grades of oil. Think I have a good topic for my next conversation with my Chemical engineer buddy at Mobil.
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Last edited by allcool; March 31st, 2013 at 08:18 AM.
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