Mixing oils to create your own blend!

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So funny you ask!! I just picked up some M1 AFE 0w20 and was thinking of mixing with my remaining PU 5w20..wats ur reasoning?
 
Originally Posted By: rw19
PU has great detergents and AFE is PAO based. So I thought I would create a mutant mega oil.


Do be careful, you may end up creating an actual mutant. Weird science!
 
Some may say I have too much time on my hands. What about this natural gas made base stock on the PU. Is it compatible with the normal hydrocracked base stock?

I wish I had gotten into chemical engineering. I can tell you I would have been a happy camper making oil.
 
Originally Posted By: rw19
Its about 35-55% atleast from my research!
The amsoil you run on your civic whats the pour point?


-54C/-65F
 
Originally Posted By: rw19
Some may say I have too much time on my hands. What about this natural gas made base stock on the PU. Is it compatible with the normal hydrocracked base stock?

I wish I had gotten into chemical engineering. I can tell you I would have been a happy camper making oil.


In general most any oil you buy is designed to be compatible with any other oil regardless of base stock. And in general even though they are compatible it is usually never ideal to mix oil either because of different chemistry's and additives.

And I have never gotten any definitive information on whether mixing two identical brand oils such as a 5w20 with a 5w40 will truly result in a 5w30 weight...or is the result mixture just a bunch of 5w20 molecules swimming with 5w40 molecules. I know many assume it becomes a 5w30, but I've seen many assumptions backfire.
 
Originally Posted By: rw19
Identical to AFE. I might give it a shot next time. Zero weight oils are the way to go.


Maybe it's changed, but I thought M1 0w20's pour point was -48°C (-54°F).
 
Originally Posted By: CurtisB
Do be careful, you may end up creating an actual mutant. Weird science!



Bill Paxton before he was famous, actually.
 
Originally Posted By: rw19
What do you guys think about mixing pennzoil ultra with 0w 20 AFE mobil 1


They're both good oils. I wouldn't mix them, though. Mixing weakens the beneficial properties of the two different additive packages.

But yes, you can physically mix API-approved oils because the specifications require them to be miscible with each other. But that only assures they won't separate phases in your oil pan.
 
Originally Posted By: Brule
And I have never gotten any definitive information on whether mixing two identical brand oils such as a 5w20 with a 5w40 will truly result in a 5w30 weight...or is the result mixture just a bunch of 5w20 molecules swimming with 5w40 molecules. I know many assume it becomes a 5w30, but I've seen many assumptions backfire.


It has been well-established that viscosity calculators (such as Widman's that is often referenced here) can predict high-temperature viscosity within a few percent. So you can calculate what you would get for 100C viscosity if you mix a 20-weight and 50-weight in any proportion.

What isn't predictable is if you mix a 0wXX with a 10wXX what you get for a cold flow rating.
 
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