classic motorcycle forum
Motorcycle Discussions => British Bikes => Topic started by: peteR on June 09, 2018, 03:57:59 PM
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Folks,
i've come across some oil I have never seen before. I have a recently bought A10 Rocket Gold Star and am changing the oil. I have drained the tank, but have found that the existing oil is a very bright blue/purple, quite sticky oil. I haven't come across this before. Does anyone have any ideas what this oil might be and what precautions I might need to take before refilling?
Thanks PeteR
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It means somebody's used that dangerous purple inferior engine oil to save a few bob and left your engine liable to a very expensive failure. To help you out I'll take it off your hands for a hundred quid and rebuild it using proper 20W/50 oil. Deal?
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Make sure some posy $%^ has not used castor oil instead of mineral before you top up with mineral.
auto censor strikes, that should of course read twot with an a.
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Make sure some posy $%^ has not used castor oil instead of mineral before you top up with mineral.
I certainly don't believe it to be castor oil. There has been not even a hint of the distinctive smell I would have expected.
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In that case just fill with the desired lubricant of choice ;)
[I've heard that what passes for R these days does not have the nostalgic perfume of yore, true or not I don't know]
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the existing oil is a very bright blue/purple, quite sticky oil. I haven't come across this before. Does anyone have any ideas what this oil might be
http://www.royalpurpleconsumer.com/
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Thanks L.A.B. From this it looks like it is (as suspected by other) that it is simply a synthetic lubricant. So this being the case, I should be OK to drain, filter clean and fill with some proper mineral oil?
P
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So this being the case, I should be OK to drain, filter clean and fill with some proper mineral oil?
I expect so although a modern synthetic is probably the better choice.
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Now, I didn't expect you to say that!
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When I drained the gearbox oil from my Guzzi V50 I was shocked to find it a violent pink colour. Apparently it was some very expensive shock-proof stuff which I'd never heard of before.
Refilled with ordinary gear oil and it seems fine to me.
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Designer clothes, designer handbags, designer oils.
Good excuse to bump the prices up... ?
That said, they do seem to have better additive packages.
And the oil may be a squidgy bit better too (?)
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The plot thickens...
I have looked again at the oil that I drained from the tank. Whilst it appeared purple when it drained, now it has settled, I can see that the oil is a relatively normal colour, but there is a heavy purple sludge that has settled underneath the oil. Furthermore, sticking my finger inside the filler cap, and feeling the inner wall of the tank, there is a heavy, very sticky purple residue all over the inside walls of the tank.
I am even more confused than before....
Any ideas?
PeteR
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Hi Peter,
It look like someone has added one of the "snake oil" :o additives to the oil (STP Lucas and so on)
I would wash out the oil tank and change the oil a few times repeating the wash out
Is the engine running the original timing side bush or needle roller conversion?
Those additive will destroy needle roller bearings in short order >:( >:(
I would also remove the timing cover and check for play on the crank bush (if it is on a bush)
Wash out the goo from in there too
That crap is added to the oil by unscrupulous sellers to hide engine knock's >:( >:(
John
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I agree to wash it out thoroughly and go with the oil recomended for your bike.