How much is too much gasoline in a waste oil blend? - Diesel Bombers



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Old 03-10-2013, 11:12 AM
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Default How much is too much gasoline in a waste oil blend?

Blending gasoline at 20% with WVO has worked pretty good for the last 6 years for my old 6.2L Detroit Diesel engine; however, going over 20% increased the likelihood of injector pump failure.* So, I recently made up sample blends and put o-rings: Buna-N 70, Silicone 70, V75 Viton in them and left them to soak.*

Stanadyne DB-2 injector pumps use both Buna-N 70 and Silicone 70 o-rings.* I found in my experiment that Buna-N 70 o-rings can handle blends containing up to 50% gasoline; however, I also found Silicone 70 o-rings will swell significantly in blends containing 40% or more gasoline; whereas, blends containing 30% or less gasoline will not swell either o-ring; and V75 Viton will not swell. Please photo below:

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How much is too much gasoline in a waste oil blend?
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Old 04-03-2013, 07:35 AM
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Your fresh take in this material has a lot of thought-provoking ideas that really took me by surprise. I share your thoughts on many points. You really made me think.
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Old 04-08-2013, 09:10 PM
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Thanks for testing this!
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Old 10-28-2014, 02:01 PM
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interesting
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