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PostPosted: Mon Feb 22, 2016 7:16 pm 
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Still in the Driveway

Joined: Sun Sep 23, 2012 6:39 pm
Posts: 6
Country: USA
Bikes owned: T500
During my road racing years, I frequently used Castrol R (castor bean oil). It seemed to work well, but required throwing away pre-mix if it wasn't to be used within a couple of days and would drop out of suspension when the weather got cold. I recently got a quantity of Silkolene castor/synthetic oil and would like to use it for my return to the drag strip. Is this stuff any better than traditional bean oil and have a longer shelf life when mixed with racing gas? If you have some experience with this product, I'd like to hear from you.


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PostPosted: Tue Feb 23, 2016 10:53 am 
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AMA Superbike
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Joined: Tue Oct 14, 2008 6:47 pm
Posts: 1707
Location: Blythewood, SC, USA
To tell the truth, I have never heard of the Silkolene product. The castor-based oils have pretty-much disappeared. I have no idea, but thought someone should respond. Sorry.....


Lane

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If you stroke it more than twice; you're playing with it.

Too many bikes, too much time, ENOUGH SPACE, FINALLY! Never enough money.........


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PostPosted: Wed Mar 23, 2016 7:58 am 
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Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Posts: 5868
Location: Illinois
Pros:
Silkolene oils made by Fuchs - excellent oils. Used to use it all the time in our RS250 Cup bikes. Got it from www.Silkolenestore.com in Texas. Great people.

Castor is still the highest lubricity oil.

Cons:
Suzuki cranks not well suited to pre-mix even if slingers and main bearings are modified, but they can last 13 seconds or so.

Castor based oils tend to leave a sticky residue if left for any significant time. Not sure how much modern blends oxidize but it used to be a problem. I need to research that again.

Pre-mix of any sort goes off pretty quickly. Fuel loses its top ends (lighter fractions) and oil separates out. Best to use a small tank and mix only enough for the run/day. At the end of the weekend, drain all race gas and throw it in a can to be used in a farm truck, weedwacker or street (dirt) bike if you do enough street miles and flush it through after use.

YMMV


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