Synthetcs and wet clutches/brakes

gsxr1100 · Jan 15, 2005

I know my gsxr1100 states to only use engine oils approved for wet cluthes; hence, JASO MA cert oils.

I also know that is why Amsoil, for example, created their motorcycle oil about 6 to 7 years ago. Everyone was putting in normal synthetic oil which was incorrect for wet clutch use.

I even remember using it. Their 20w-50 oil looked like ATF fluid..at the time.

getut · Jan 15, 2005

GSXR.. I don't know as much about oil as you do, but I have seen one term used and had it explained to me. It is much different than the context in which you use it.

You keep mentioning Dino and hydro-cracked as different things. It is my understanding that they are not different. Hydrocracking has nothing to do with the oil itself, only the method used to extract the same dino oil from the ground.

From my understanding: Oil reserves are found underground and they drill down to the pocket. The first bit they get out is easy. Once the pocket starts becoming nearer and nearer to emtpy, the oil exists in little veins emanating out from the large pocket. The pump the pocket full of water and pressurize the pocket. This pressurization "cracks" the veins and releases more oil that they can then pump out and seperate from the water. Thus the nick name of the process, hydro-cracking.

gsxr1100 · Jan 15, 2005

GI- solvent refined petroleum base stock. It is common belief that no SL rated oil uses 100% GI basestock, but some of them do have some GI in them.

GII- hydrotreated petroleum base stock. More refined, with less gunk in it. More stable, and usually with a higher viscosity index. Chevron and pennzoil oils use nothing but this group in their oils. Common belief that all SL oils use this in a certain amount.

GIII- "hydrocracked" or severely hydrofinished base stock. Castrol won the right for oil blenders to call this group "synthetic". Most OTC synthetics are made from this base. I think they use the same process to make it as GII, but take it a step further.

G-IV PAO base stock. Chemically produced from ethelene gas. True synthetic oil, and primary basestock used in mobil, amsoil and most top tier synthetics. Much more stable and has higher VI index than GIII. Can handle more extreme temps.

G-V ester base stock. used in most synthetic oils for miscibility, and is primary base used in redline and a few others. Extreme natural detergency and cleaning ability. Strong attraction to metal. Can withstand more extreme temps than PAO.

getut · Jan 15, 2005

If all that is true, then the hydrocracked you are referring to and the hydrocracked I am referring to are two completely different things.

Charolais · Jan 15, 2005

Amsoil Formula 4-Stroke Synthetic Motor Oil SAE 0W-40 is what I use in my ATV. It's Friction Modifier Free for wet clutches. Friction Modifier Free
AMSOIL Formula 4-Stroke Synthetic Motor Oil contains no friction modifiers, making it ideal for ATV, outboard motor and motorcycle engines. The friction modifier free formulation of AMSOIL 4-Stroke ensures transmission (manual or automatic) and clutch compatibility and prevents slip.


I use Amsoil ATH-05 Synthetic Tractor Hydraulic/Transmission Fluid, ISO 46, SAE 30 in both tractors. My Farmtrac 80 had a bad case of wet brake chatter after about 30 hours. Put the Amsoil in at the 50 hour change and haven't heard a peep out of the brakes since.

Got a set of Fasse 12vdc valves(for remotes) on the 2610 Long. Was running NH hy/trans in it. Each spring I would have to remove one of the solenoid valves and unstick the spool. Just a tiny bit of rust would lock the spool up over winter. Did that for 3 years straight. Changed it over to the same hyd. oil (Amsoil) as the Farmtrac and haven't had to touch that valve since. Synthetic Tractor Hydraulic/Transmission Oil

sneaky_pete · Jan 15, 2005

( If all that is true, then the hydrocracked you are referring to and the hydrocracked I am referring to are two completely different things. )

Yes, you are confusing hydraulic fracturing of producing oil and gas wells (what you are talking about) with refining technology after the crude is already out of the ground (what Mike is talking about). Hydraulic fracture stimulation is commonly referred to as "fracing", but never "hydrocracking".

ducati996 · Jan 15, 2005

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I have experienced kind of the opposite effect on my 1995 Yamaha V-max. I noticed slippage when I used Synthetic
(regardless of brand) Vmax for some reason were more sensitive to synthetic oil (well documented by engine builders and performance shops)...The Vmax is a wet clutch bike, but the opposite is on my Ducati (dry clutch with lots of chatter)
Synthetic has zero effect on that because its dry....
I cant say tractors would be under the same stress as performance bikes, so I wonder if it would even matter. At least the synthetic will lower the temps better...

Ducati