<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>Brian,</div><div>I have bought a few 20 litre cans of different types of mineral oils that</div><div>were recommended to me by industrial chemists. Even though they</div><div>were meant to be very pure (low in aromatics) they were softening plastics</div><div>when I was using them in motors.</div><div>With any alternatives, I would be careful that they don't yellow in time. With</div><div>the powerful LEDs they can put out a lot of heat that probably helps with</div><div>yellowing & deterioration of plastics.</div><div>I am using silicone in my motors. I believe that Emile went over to silicone</div><div>for thrusters a while back.</div><div>Alan</div><div><br>On 19/02/2019, at 4:05 PM, Brian Hughes via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div>
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Oil compensation and biodegradable alternatives - especially for lights - any ideas? Hank uses vegetable oil. What about filtered biodiesel or diesters. Suggestions?<br>
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Brian<br>
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