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Mixing-Blending oil types

 
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javiercarrascob



Joined: 06 Sep 2009
Posts: 62
Location: Virginia

PostPosted: Wed Jul 27, 2011 6:44 pm    Post subject: Mixing-Blending oil types Reply with quote

Hello Gang,

Hope you are enjoying EAA week, I'm currently using Aeroshell 100W. for my M-14p powered Yak-55m.

As you may know when you do cross country in a '55 there is not much room to bring oil with you.

I find my self landing at FBOs that don't carry either Aeroshell 100W or 120w in summer (80w in winter). Not to mention Phillips 25w-60 is even harder to find (hence I use 100W).

So

Question 1: Can I mix/Blend Aeroshell 100w with 100? I understand that one is ashless dispersant and the other one is straigh mineral (no aditives)?

Question 2 : Can I mix 100w with 80w when it starts to get cold?

Question 3: Can I mix Aeroshell 100w with Phillips 25w-60?

Thanks, Javier
N5245H


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MONTY(at)bpaengines.com
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PostPosted: Mon Aug 01, 2011 8:54 am    Post subject: Mixing-Blending oil types Reply with quote

You can mix AS 100W with AS 80W or either with AS xxx M. You are
correct. Asxxx W is ashless despersant oil and xxx M is straight
mineral oil without the additives that make it xxx W. What you should
not do is mix synthetic oils with petroleum based oils.

AS 100 W is good oil in my books. That's what we use in our M14 test
cell from the git-go. Never had a problem. Failure of rings to seat is
usually not a problem caused by oil. It is operator error as a general
rule, can be unclean at assembly. It is impossible to get cylinders (
or anything else ) too clean. If I could sterilize them I would.

Monty Barrett
BPE, Inc.

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