fully synthetic oil a deadly sin for my slipper?? : Kawasaki ZX Forums: Kawasaki Ninja Forum

ZX^R PARKZ · 02-03-2008, 06:00 PM

No I haven't spilt oil on my slippers haha, I have just completed an oil filter and oil change on my 2007 zx6r p7f, I have used 10w50 fully synthetic but now i'm being told I should put semi-synth in as fully-synth is bad for the slipper clutch and prevents a proper engagement causing the clutch to slip under heavy acceleration, I have done 25 miles since and cant say i've noticed anything but for peace of mind guys is this bull or is there some truth in this???

Many thanks

Gary

Darin · 02-03-2008, 06:23 PM

You'll be fine. If it would mess up the slipper you'd have a great big warning sticker saying NO!

Jester · 02-04-2008, 04:19 AM

never heard that BS

I have always used full syn in my 07 10r and never had a problem!

ZX^R PARKZ · 02-04-2008, 08:24 AM

cheers guys, great help !!

Saint_Matthew · 02-12-2008, 10:54 AM

I've been told to use a Semi-Synthetic because of the wet clutch. My clutch needs the tackiness of the petroleum based; Full Synthetic can contribute to unwanted slipping. I haven't seen the Lewis Structure of the clutch plates or any type of bottled oil, so I have no proof of the Carbon bonding.

madmax2295 · 02-12-2008, 03:49 PM

i have used full syn since the first 2 changes(at 500 and 1000miles used regular kawi chem). Now full syn kawi chem all the time, no problems here.

steve snow · 03-05-2008, 04:56 AM

Quote:

Originally Posted by ZX^R PARKZ

No I haven't spilt oil on my slippers haha, I have just completed an oil filter and oil change on my 2007 zx6r p7f, I have used 10w50 fully synthetic but now i'm being told I should put semi-synth in as fully-synth is bad for the slipper clutch and prevents a proper engagement causing the clutch to slip under heavy acceleration, I have done 25 miles since and cant say i've noticed anything but for peace of mind guys is this bull or is there some truth in this???

Many thanks

Gary

If Mr Kawasaki says use 10/40 oil then thats what you should use, ie Rock oil 10/40 semi synth, total waste to use fully synth , unless you ride at redline all the time...or fully tuned race prep engine.

gammac · 03-05-2008, 07:20 AM

I've been using Motul 4/100 for about 15,000km.
gammac

thekawidog · 03-05-2008, 10:07 AM

Quote:

Originally Posted by steve snow

If Mr Kawasaki says use 10/40 oil then thats what you should use, ie Rock oil 10/40 semi synth, total waste to use fully synth , unless you ride at redline all the time...or fully tuned race prep engine.

actually you are wrong. full synthetic has these benifets; reduces the chance of sludge buildup, keeps viscosity longer than conventional oils. will hold its vicosity better in cold and hot temps. you can even use it in new motors. also some full synthics are made from "rock" oils to some degree.

and yes i use full synthetic in my bike too, (currently 1000 miles)

steve snow · 03-05-2008, 12:02 PM

Quote:

Originally Posted by thekawidog

actually you are wrong. full synthetic has these benifets; reduces the chance of sludge buildup, keeps viscosity longer than conventional oils. will hold its vicosity better in cold and hot temps. you can even use it in new motors. also some full synthics are made from "rock" oils to some degree.

and yes i use full synthetic in my bike too, (currently 1000 miles)

Actually I am right me old mate....If oil and filter changed at specified intervals as per Mr Kwacker then there is NO benefit from fully sythetic oil over semi synthetic....Ask yourself if it was that much of a benefit Mr Kwacker would specify it....But as you know they do not.
We are of course talking about motorcycles for us normal riders not the full on racers... Any case, you pays yer money and takes yer choice, if yer happy to use Full Synth then thats great !

Jester · 03-05-2008, 03:16 PM

I am surprised the boys from AMSOIL havent jumped in yet to straighten us all out!!!
Must not be any money in it for them!!

Spliffyaid · 03-06-2008, 01:59 AM

Quote:

Originally Posted by Jester

I am surprised the boys from AMSOIL havent jumped in yet to straighten us all out!!!
Must not be any money in it for them!!

Yeah, Im surprised a multi national oil compnay hasnt jumped in to try and sell 5l of oil myself Jester

Hmmm the synthetic/semi synthetic debate...................

Ill get my popcorn

flybyuin2.2 · 03-06-2008, 07:59 PM

I believe that semi-synthetic only contains 10% or less of synthetic oil and the rest is dino. I strongly believe it's a myth that synthetic is bad for the slipper, just like years ago everyone was told not to use synthetic in auto transmissions or it will slip and now almost every manufacturer uses it and calls it a lifetime transmission fluid.

Ian_05_636 · 03-06-2008, 08:43 PM

There are some synthetics that are bad for wet clutches. They are mostly the "car" oils. Any synthetic that says "energy conserving" on the back is BAD for a wet clutch, but not necessarily a slipper clutch.

Energy conserving oils have friction modifiers in them that will cause a wet clutch to slip.

NOX · 03-07-2008, 12:02 AM

Who told you that? That is all bs. Look at what the pros use, the BEST synthetics money can buy. Drop some Royal Purple racing grade in and roll........

steve snow · 03-07-2008, 02:32 AM

Quote:

Originally Posted by Jester

I am surprised the boys from AMSOIL havent jumped in yet to straighten us all out!!!
Must not be any money in it for them!!

I think in conclusion that it is the individuals choice what oil is put into his/her bike...If oil changes are as per Kwacker intervals and the oil used meets or exceeds their spec , then no harm will come to the bike, just stick to bike specific oils.

In the UK I use 10/40 semi synthetic plus genuine Kwacker oil filter, bike has been on dyno 5 times and no harm has come to it.
Making 114.47 RWHP with RS5 slip on, Custom mapped P.C, DNA filter and secondry butterflies removed along with -1 front sprocket and Speedo healer.
2007 ZX6R UK Spec.
Have seen 154 genuine mph with gearing change ( would have been around 173 indicated, such is the standard speedo error)...Bike still had around 600 rpm left to go so would hope to hit around a genuine 158 ish MPH which in fairness is not far off the 162 mph tested speeds in UK, so can't complain at all.
The -1 gearing gives a genuine 74 MPH in first gear at limiter instead of 87 MPH on standard gearing and with the speedo error !! , also makes bike easier to launch off the line ( no bogging) and drive is improved everywhere.

Enjoy what you ride !!!

QuietFlight · 03-07-2008, 07:15 AM

25500 miles on my 07 ZX10 used Motul or mobil 1 4T synthetic and still runs like a champ. (probably 12000 track miles.)

ZX^R PARKZ · 03-09-2008, 09:51 AM

crickey good replys, diidnt think i'd cause much of a controversy here!! while we are on the subject, I seemed to have now sprung a leak...... yes oil leak, all around the filter is dry, overflow pipe is dry but seems wet around the top of the exhust manifold, and now dripping down the outside of the fairing, any ideas guys???

no i havent taken the fairing off yet, havent had time, warrant ran out 2 days ago aswell, bloomin typical!!!!!

flybyuin2.2 · 03-09-2008, 05:57 PM

I assume it's the left side fairing just like the rest that needed a valve cover gasket replacement, it should be made a recall.

slim1100 · 03-09-2008, 08:45 PM

65'000 km on mine all synth no mineral ..... no problems yet