Full synthetic or semi synthetic...what best for the 12r? - Kawasaki Forum :: KawasakiWorld.com
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post #1 of 34 Old 02-16-2012, 08:40 AM Thread Starter
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Full synthetic or semi synthetic...what best for the 12r?

Last year I ran the full synthetic mobile 1 4t 10w-40....everyone I talk to says full synthetic is too slippery for the clutch and that it won't grab as strong as it should...what's you guys opinion on the subject, full or semi?
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post #2 of 34 Old 02-16-2012, 09:54 AM
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run it with a little bit of sand..... that will help the clutch grab.....lol




Seriously though...

I've never heard that to be an issue running synthetic.
There are people burning steels with synthetic. That wouldn't be happening if it was "too slippery"
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post #3 of 34 Old 02-16-2012, 10:03 AM
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Semi synthetic
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post #4 of 34 Old 02-16-2012, 10:52 AM
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semi synthetic
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post #5 of 34 Old 02-16-2012, 11:38 AM
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Garage
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Semi Synth


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post #6 of 34 Old 02-16-2012, 11:46 AM
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Semi all day
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post #7 of 34 Old 02-16-2012, 12:33 PM
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Anyone with a reason why they are saying semi?
I've been running on bleedin' expensive Fuchs Silkolene fully synthetic for the last 8000 miles. The bike is running as well as it ever has. Clutch feels fine and the gear box is smooth.
Apart from the crazy cost of the stuff, I would like to know why not use good fully synth oil.

If at first you don't succeed....take a longer run up!!
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post #8 of 34 Old 02-16-2012, 12:37 PM
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I`m running 0w40 Mobil One without problems...
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post #9 of 34 Old 02-16-2012, 12:45 PM
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Ive just started to use the castrol 1 fully synthetic and my clutch has started to slip but this maybe is due to wear also on the clutch even though all springs and stack heights measure ok so i may go back to the rock oil gaurdian i have used in the past which is semi synth 10 40w. My clutch is also quite dry so i just think it maybe coincidental that slip has got worse since the oil change
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post #10 of 34 Old 02-16-2012, 12:52 PM
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Mob 1 MX4T or racing 4T, whatever it's called now, full synth, 10 years now, zero probs.

Whether you think you CAN or CAN'T... YOU'RE RIGHT.

IGNORANT and STUPID are not the same…but, one can be BOTH.
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post #11 of 34 Old 02-16-2012, 02:14 PM
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I use Mobil 1 4t, Castrol 4t, Valvolene 4t or what ever 4t synthetic oil I can find on sale. I service alot of motorcycles. 4t is for motorcycle wet clutch and if the synthetic doesn't have that 4t designation, it will either start slipping immediately or after some use. I found this out back in the early 90's when I did a Mobil 1 oil change on my 87 CBR 600 Hurricane. It ran like gangbusters, but the clutch would slip like crazy. Back then they didn't have the 4t synthetic.

I made a mistake once, but I was wrong?
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post #12 of 34 Old 02-16-2012, 02:33 PM
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the absolute best full syn possible here

01 ZX-12R 8.84 @ 156.3 on dot tires, NA.... turbo 8.47 @ 164
00 ZX-12R 8.62 @ 165.2 no bars, slicks, 55 shot... turbo 8.32 @ 173
00 ZX-12R 1: 222.046 1.5: 226.390 Worlds Fastest NA Kawasaki
00 ZX-12R street turbo 1: 227.9 1.5: 234.1
00 ZX-12R LSR turbo 1: 249.5 1.5: 266.5 Worlds fastest ZX-12R CMG Racing RCC Turbos
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post #13 of 34 Old 02-16-2012, 03:50 PM
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Mobil 1 automotive. Full synth. No problems in 85,000 miles.
Of course, I'm running a much stronger and durable busa.....
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post #14 of 34 Old 02-16-2012, 04:01 PM
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wanna compare dyno sheets?

01 ZX-12R 8.84 @ 156.3 on dot tires, NA.... turbo 8.47 @ 164
00 ZX-12R 8.62 @ 165.2 no bars, slicks, 55 shot... turbo 8.32 @ 173
00 ZX-12R 1: 222.046 1.5: 226.390 Worlds Fastest NA Kawasaki
00 ZX-12R street turbo 1: 227.9 1.5: 234.1
00 ZX-12R LSR turbo 1: 249.5 1.5: 266.5 Worlds fastest ZX-12R CMG Racing RCC Turbos
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post #15 of 34 Old 02-16-2012, 04:02 PM
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I just grab the Nikkon (or whatever it's called) 15W50 Blended oil sold at the stealer every spring....sometimes 20W50....thinking I may try 10W40 this year. I can't tell that the increased viscosity is helping it run any cooler, but more like robbing it of power so,.....

"In a world full of hate.....There is nothing left to divide."
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What's wrong with you people? The sky is MANY colors throughout the day....not JUST BLUE!
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