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1 Nov 2007
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Join Date: Jun 2006
Location: London but a bit everywhere
Posts: 183
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Moto engine oil swells O-rings...???
Hi all,
I spoke with a mechanic earlier this week regarding making a homemade chain oiler for my bike so I could use (new) engine oil with it.
He told me that motorcycle engine oil tends to swell the O-rings... now this is totally new for me, anyone has heard anything similar?
I want to add that this guy is not a dealer, he is just a mechanic (old friend of mine by the way) and he has no interest in selling/not selling a particular item to me.
Any comment?
:confused1: :confused1: :confused1:
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1 Nov 2007
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Registered Users
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Join Date: Jun 2007
Location: Ripley, Derbyshire
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Hi,
Yes Oil will swell an O'ring because the oil gets hot and the rubber expands under heat, that's partly why they use rubber for SEALS.
Don't use engine oil on your chain it's gets flung off to easy and will mess up you bike, and could be very dangerous if it gets on your tires or brakes. Chainsaw oil I think is what most people are using that don't want to pay the money for a Scottoiler and it's recommended fluid.
Hope that helps
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2 Nov 2007
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Location: belgium
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engine oil
i use already a long time a pro-oiller system it works with engine oil no problems whatsoever
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2 Nov 2007
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Join Date: Mar 2007
Location: Hampshire, UK
Posts: 52
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Juddadredd -mate. I promise I'm not following you around to disagree with you.
A few years ago I was tired of shelling out for Scottoil and thought I'd save money by paying the same amount for 5 litres of chainsaw oil as I would for 500ml blue Scottoil. I'll agree it worked, after a fashion, but in the UK (and not in the middle of summer) it flowed so slowly that I almost had to have the scottoiler set on full the whole time. Yes it didn't fling off, but it also didn't give much a range of control of the flow.
In a warmer environment I'm sure it would be fine but I went back to buying the blue stuff after I'd emptied my high-capacity reservoir.
Maybe it was just the brand of cheapskate chainsaw oil I bought.
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6 Nov 2007
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Join Date: Aug 2005
Location: BC, Canada
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Engine oil these days has additives that "swell" o rings and seals .
But what this really means is that it keeps the seals supple and prevents them baking and becoming hard and brittle at engine operating temperatures .
I wouldn't really worry about the effect it would have on your chain .
Use whatever oil works best for your situation , gear oil ,engine oil [most of which can be used in gearboxes anyway] or chainsaw cutterbar oil , if it's too thick dilute it with some parafin or diesel .
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"When you come to a fork in the road ,take it ! When you come to a spoon in the road ,take that also ."
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