Fully synthetic V Semi synthetic oil

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Do you use semi or fully synth oil?

Semi
18
78%
Full
5
22%
 
Total votes: 23

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Falcopops
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Fully synthetic V Semi synthetic oil

#1 Post by Falcopops » Tue Feb 13, 2007 1:25 pm

Well it wasn't long before it was raised in another post.

To avoid going over it all again let vote on what we use. I'd be interested inthe results, but then again I've got no mates.

A search of the old site will reveal the pro's and con's

Edit: I use fully synthetic, but only just put it in so buggered if I know if it causes clutch slip.

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Kwackerz
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#2 Post by Kwackerz » Tue Feb 13, 2007 1:30 pm

I seem to recall Jorge used fully synthetic in the race RSVR without any ill effects.

The plus side is it doesnt degrade and break down over time as readily as mineral based oil, has usually better shear capabilities, amongst other things, meaning it can take abuse better.

Ride it like you stole it, but only on fully synth... :smt003
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#3 Post by the duke » Tue Feb 13, 2007 1:39 pm

Oh dear...

My first handfull of posts and i've kicked off 2 polls

All i've got to say is it's only what i've been told when i went to the shop for some oil and i've not used fully synth myself.
And i have not seen any past posts on the subject, only replied to a question someone else asked.

BUT..... Kwackerz.
You say it has better shear capabilities. Well thats why a clutch would slip when it gets between the plates. It doesn't get squeezed out, it sits there and
provides an oil gap between the plates.

(Oh dear what have i started)

Ben

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#4 Post by Kwackerz » Tue Feb 13, 2007 1:43 pm

anti shear capabilities.. errm..

Yeah ive probably got an answer somewhere in my head back from the days when I did my apprenticeship.. (if i'd listened and paid attention i'd probably recall 'important' stuff like this.. sadly I was more interested in the welsh chick i was seeing...)
Last edited by Kwackerz on Tue Feb 13, 2007 8:27 pm, edited 1 time in total.
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Falcopops
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#5 Post by Falcopops » Tue Feb 13, 2007 1:51 pm

the duke wrote:(Oh dear what have i started)
Healthy debate and an opportunity to express and hear opinions.

If you've managed that in your 1st few posts then hats off to you sir. :smt023

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#6 Post by bigun » Tue Feb 13, 2007 2:54 pm

I didn't think it was good for the clutch on aprilias? :smt017 I've only ever used semi-syn with no side affects but can't comment on fully synth.
Bigun

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#7 Post by Firestarter » Tue Feb 13, 2007 4:11 pm

Semi, but then I've not changed the oil (dealer serviced cos of the warranty), and they've always just followed the service schedule.

Well, at least in what oil they've used, whether they follow the service schedule is a topic for another poll... :smt011

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#8 Post by Falco9 » Tue Feb 13, 2007 5:01 pm

Semi because I change it far too often to ever consider using fully synthetic

Plus the Barnett clutch doesn't like it (I'm told)

F9
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#9 Post by falcomunky » Tue Feb 13, 2007 5:21 pm

I tried fully synthetic on me old CBR6 and she didnt like it; Clutch slipped like crazy! Put semi in and problem solved!
I havnt needed to do an oil change yet on the Falco but I will deffo be using semi... :smt002
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Fausto
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#10 Post by Fausto » Tue Feb 13, 2007 5:31 pm

Erm....... it's a sort of yellowy brown colour and says Silkolene on the tin :smt017

I'm going to have to go out to the shed aren't I :smt012

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Aladinsaneuk
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#11 Post by Aladinsaneuk » Tue Feb 13, 2007 6:06 pm

what ever my spanner man tells me to use - semi I think

For my ducati, it HAS to be fully synthetic - and the stuff they recomend is 18 quid a litre....

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#12 Post by Fausto » Tue Feb 13, 2007 6:12 pm

I'm back.....

............ and now I'm worried !!

Just checked the container and it's Silkolene Comp 4 fully synthetic 10 - 40.

Not too bothered whether it affects the clutch - if it does I'll change to semi - but is it too thin?

Aprilia recommend 15-50. - synthetic by the way
Silkolene recommend 15-50 - also synthetic (Pro 4)

Presumably I'm fine for now but should change to heavier oil (15-50) for the warmer weather ???

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#13 Post by Falken » Tue Feb 13, 2007 8:04 pm

:smt001
Had a problem with oil just after getting the Falco.
The dealer where I bought my Falco from put 10-40 in at the first (600) mile service, and before the second (4,500) mile service there was no oil showing in the view tube following a 150 mile trip.
It seems that 10-40 it to thin and just gets used more quickly.
The dealer said this happens with Vee twins.
Found myself a better dealer for the second and following services.
Following letters to Aprilia, it was agreed that this would not invalidate my warranty.
But don't go to that place at Clay Cross.
Adventure before Dementia.

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#14 Post by paddyz1 » Tue Feb 13, 2007 8:55 pm

the duke wrote: BUT..... Kwackerz.
You say it has better shear capabilities. Well thats why a clutch would slip when it gets between the plates. It doesn't get squeezed out, it sits there and
provides an oil gap between the plates.

(Oh dear what have i started)

Ben
Contradition

Oil stays there yes, I does not get squeezed out therefore no other oil gets in. So in theory, if it was assembled with semi or mineral oil it will most likely still be on the plates next time it gets stripped even after many oil changes.

I use fully synthetic by the way.

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#15 Post by Kwackerz » Tue Feb 13, 2007 9:03 pm

Q: What about using Synthetic Oils in my clutch?
A: Synthetic oils, by their very nature of better heat resistance and improved lubricating properties, would seem to have an advantage. This is an advantage when it comes to lubricating an engine or transmission, but turns into a disadvantage when used in a clutch. This increase in lubricating properties (they are slippery) can cause an old, worn out clutch to fail. The purpose of the oil in a wet clutch is to cool, not to lubricate. The more 'slippery' an oil is, the more likely a clutch is to slip, resulting in increased heat and creating excessive wear.
While most high performance clutches are designed to work with synthetic oils, it is not recommended that they be used by most clutch manufacturers. Synthetic blends are usually considered acceptable.

From a *coughs* Harley Davidson*coughs* website.

Most 'synthetic oils in circulation are synthetic blends and not fully synthetic, (even when they say 'synthetic' on the tin) so as said in the last line of the quoted answer, are acceptible..



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