AMSOIL 10W40

Anybody ever run AMSOIL 10W-40 Advanced Synthetic Motorcycle Oil in their bikes? I always thought that synthetics were a no-no for wet clutchs but according to AMSOIL their oil is wet clutch specific.

"Provides Excellent Wet Clutch Performance
AMSOIL Synthetic 10W-40 Motorcycle Oil contains no friction modifiers and promotes smooth shifting and positive clutch engagement. AMSOIL MCF controls heat and prevents slippage and glazing, helping improve clutch life. AMSOIL Synthetic 10W-40 Motorcycle Oil meets the wet clutch frictional requirements of JASO Standard T903: 2006, MA/MA2 and ISO-L-EMA2 of ISO Standard 24254:2007."

Just wondering, stuff is not cheap but if it is as good as they say it is...
Anybody have any experiences with AMSOIL? Good or bad.

Mike

 

The "synthetics are bad for wet clutches" adage is based on general experience with automotive oils, it's not a hard and fast rule. Good guideline for the uninitiated.

However, as you've discovered, there are now synthetic JASO-Service oils out there that ARE compatible with our bikes, or at least should be.

Right now I'm "evaluating" Castrol's ACT>EVO 4T Semi-Synthetic 20W40, which is claimed to be formulated specifically for high-revving four cylinder motorcycle engines with wet clutches. As yet, I'm not disappointed. No clutch or starter clutch problems; but then again I've only managed about 300 miles so far this season since it won't stop raining.

I can't answer for AMSOIL, but as far as Castrol's motorcycle-formula Semi-Synth goes, it seems to be fine.

I think "meets the wet clutch frictional requirements of JASO Standard T903: 2006, MA/MA2 and ISO-L-EMA2 of ISO Standard 24254:2007" is the key. It's "motorcycle oil." Let us know how it works for you if you decide to try it.

 

I use the Amsoil 10W40 motorcycle oil in both of my bikes. The main reason I use it is because it is a redline oil, which will last MUCH longer in air cooled engines in summer than conventional oils will. Many conventional oils will break down in less than an hour at the 300F temps our oils run on a hot summer day.

As advertised by Amsoil, I have no problems at all with the clutch, and the shifting is quite good too. On the down side, the starter clutch in the XJ doesn't like it much. It will often break loose, especially if the battery is a bit low.

 

I bought AmsOil 20W50 motorcycle for my 900 and immediately the starter clutch sounded like the AFLAC duck (well, not exactly)
That $10.00 a quart oil went to my Dixie Chopper.

However - my Seca 750 likes full synthetic. I like the basic idea of synthetics being far better than conventional oils.

Hey Fitz - ever think of building your Seca 650 as your "rain" bike??