Rotella substitute ?

[stainlesscycle]

amsoil says:
Neither 0W20 nor 0W30 oils are recommended for wet clutch use and do not pass JASO MA or MA-2 specifications.


so i'm looking into silkolene's 0w-20

[lankydoug]

I use ATF+4 it's designed to run with wet clutches and is synthetic and cheap. It's thin so it is low drag when cold. There may be a reason why running ATF+4 is a mistake but I have not heard it yet.

[GMP]

I'll bet all of those newer 0-20W or 0-30W oils are automotive spec formulated for the newer cars for milage reasons and because a lot of newer motors have some type of variable valve timing system that uses the oil for hydraulic control. Therefore it makes sense that they are not recommended. The Amsoil 0-40W has been around awhile and is not speced as an automotive oil.

The point of the Rotella syn 5-40W is not that its a synthetic, but that it has a viscosity low enough for good clutch action when cold, and good shifting when hot, in a non-automotive oil (no friction modifiers). In a 2stroke, we all dump the oil long before its worn out, as it fouls with debris first.

[widebear]

Check out the training section, very informative

http://www.joegibbsracingoil.com/index.html

[stainlesscycle]

i'm more worried about the draq when hot. the 0w-40 does not drag for me when cold...

[TNT Cycle]

Yeah I noticed I was wrong the other day. Semi synthetic rotella didn't have rating when I looked last week. I think the full synthetic jasoma rating is new since they started calling it T6. The semi is called T5. Also noticed Valvaline has a ATV oil thats the same price as their other oils. Never known of anyone to use it.

[swazi_matt]

Anyone know what the trade name for rotella is in other parts of the world - south africa and oz?

[stainlesscycle]

Originally Posted by lankydoug

I use ATF+4 it's designed to run with wet clutches and is synthetic and cheap. It's thin so it is low drag when cold. There may be a reason why running ATF+4 is a mistake but I have not heard it yet.

any idea what the atf+4 is like hot? i'm guessing it's like 10weight when cold/hot???

[GMP]

Originally Posted by swazi_matt

Anyone know what the trade name for rotella is in other parts of the world - south africa and oz?

I beleive its called "Helix".

[lankydoug]

Originally Posted by stainlesscycle

any idea what the atf+4 is like hot? i'm guessing it's like 10weight when cold/hot???

when changing transmission filters on fully warmed up cars and trucks it is similar to hot motor oil but it seems like there is not as much of a change from cold to hot like motor or gear oil.

Many years ago stock car racers were using auto trans fluid instead of heavy gear oil to correct countershaft bearing failures in their manual transmissions. It seems that the thicker gear oil could not supply the volume to lubricate and cool the countershaft when running for long periods in 3rd gear. This was on a 4 speed trans where the maximum side load combined with high speed on the counter shaft would be in 3rd gear. The belief was that at high rpm the heavier gear oil was being spun to the outer parts of the case and thus starving the counter shaft.