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what oil? mineral or synthetic?

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ollieholt
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Joined: 08 Apr 2010
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PostPosted: 20:36 - 10 May 2010    Post subject: what oil? mineral or synthetic? Reply with quote
hi, which oil would you reccomend for use in modern motorcycles? ive heard differing opinions. what do you guys use?
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ms51ves3
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Joined: 07 Jun 2007
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PostPosted: 21:53 - 10 May 2010    Post subject: Reply with quote
A3 spec. Forget what marketing words are used, if it says A3 on the back I'll use it.
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LeanIt
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Joined: 23 Nov 2009
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PostPosted: 22:06 - 10 May 2010    Post subject: Reply with quote
I use Diesel oil , so long as it doesn't have those friction reducers Cool
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Ingah
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PostPosted: 00:28 - 11 May 2010    Post subject: Reply with quote
Semi-synthetic. Whatever viscosity the manufacturer states (10W30 for me as it's a CB500).
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bacon
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Joined: 09 Jan 2009
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PostPosted: 00:57 - 11 May 2010    Post subject: Reply with quote
Hein gericke semi synthetic 10w40 bike oil, £20 with a free filter, just picked some up today, bargain
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Dazbo666
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Joined: 06 Jun 2004
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PostPosted: 05:28 - 11 May 2010    Post subject: Reply with quote
Usually use Motul 5100 10W40 for me.
Used it on the GPZ for a couple of years without any problems, and plan to continue using it for the Bandit Thumbs Up Wink
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Grubby
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Joined: 15 Aug 2004
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PostPosted: 09:06 - 11 May 2010    Post subject: Reply with quote
I would advise using at least a semi synthetic oil that is to the specification that your manufacturer recommends. Most four strokes like 10/30 [url]BUT[/url] make sure by checking the spec for your bike.
You don't have to take my word for it though as I'm only an aircraft engineer so what do I know........I know not to use diesel oil though Rolling Eyes
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MarJay
But it's British!



Joined: 15 Sep 2003
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PostPosted: 09:23 - 11 May 2010    Post subject: Reply with quote
The only modern bikes that I am aware of that use mineral oils are Harleys and Buells.

Use a semi synth unless its a high revving supersports bike like an R6 or something in which case I'd use fully synth.
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t121anf
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Joined: 23 Feb 2007
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PostPosted: 10:16 - 11 May 2010    Post subject: Reply with quote
whatever the book says, so in my case semi-synthetic
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ollieholt
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Joined: 08 Apr 2010
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PostPosted: 12:19 - 11 May 2010    Post subject: Reply with quote
ive used silkolene pro 4 in my cg125, with ester in it it did quieten it down and actually free'ed up a couple of mph strangely enough, that was fully synthetic. just wanted to guage what people thought. oh yeh and diesel oil... well now thats silly isnt it?
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Kickstart
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Joined: 04 Feb 2002
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PostPosted: 12:34 - 11 May 2010    Post subject: Reply with quote
ollieholt wrote:
oh yeh and diesel oil... well now thats silly isnt it?


Not really. Diesel oils have a higher detergent content and can be useful for cleaning engines up.

Most CG125s specified SE spec oil I think, and you will struggle to find such low spec oil still on sale. Late ones listed SG spec oil I think, which is still an obsolete standard.

On most bike engines I wouldn't worry too much about whether the oil is mineral or synthetic. Main advantage of synthetics is that they need changing less often (less additives required for a reasonable viscosity spread, and it is these additives rather than the oil that wear out), but many people change bike oil very regularly anyway.

One other area synthetics seem to cope well with is when subjected to large amounts of heat without any flow. Such as in a turbo when the engine is switched off. But not really a problem for many bikes.

All the best

Keith
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nickm
Nova Slayer



Joined: 25 Aug 2004
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PostPosted: 07:25 - 12 May 2010    Post subject: Reply with quote
many years ago we raced a classic nsu outfit on diesel oil, we got through 3 cranks before we used it and our reliability issues dissappeared after we started using diesel oil!
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temeluchus
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Joined: 01 Oct 2008
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PostPosted: 07:32 - 12 May 2010    Post subject: Reply with quote
The main thing is to change oil regularly rather than buying the most expensive oil.
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hmmmnz
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Joined: 22 Aug 2006
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PostPosted: 12:30 - 12 May 2010    Post subject: Reply with quote
the cheapest possible oil i can find,
had my old b120 running on olive oil in the gear box, and as the premix oil Very Happy it smelt nice
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Old Thread Alert!

The last post was made 15 years, 224 days ago. Instead of replying here, would creating a new thread be more useful?
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