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[TowerTalk] Mixing oils in HDX689

To: TowerTalk@contesting.com
Subject: [TowerTalk] Mixing oils in HDX689
From: Thomas Noel <tnoel@mac.com>
Date: Mon, 10 Nov 2014 09:40:21 -0800
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
> ## I had notes on that..since I own a 5000 lb, old style HDX-689.
> I believe if you had dino oil in the gearbox... and wanted to switch to
> synthetic, after draining the old stuff,   you need to use some special 
> flushing compound 1st.    Then after flushing done, and drained,
> the synthetic can be added. 

Mobil says there is NO PROBLEM with mixing synthetic oil and natural dino oil 
in any ratio for use in cars and motorcycles, so I can’t imagine how there 
could be a problem in your gearbox. That gearbox has nothing like the 
high-speed shear forces found in automotive applications, and expensive 
synthetic oil is a waste.

Flame-proof suit on…

Tom
kf7rsf
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