What two stroke pre mix is best?

[oldermxr]

I use Golden Spectro @40:1 with 93 octaine

[Mountain Goat]

Motul 800 at 50:1.  No splooge, but it leaves carbon on the rear fender.  The bike pops a bit when cold, but runs like a demon when warm.

[scotty dog]

Whats the difference between pre mix stuff and auto injector stuff? I am goin to switch brands and silkolene is the better of what is stocked in my area but theres a couple dollars difference between the two but they say the same thing on the bottle. 

[beaner]

Probably viscosity. I expect the the injector oil will be thinner.

I'm going to move this here, as it was the reason I brought the thread back, but is probably lost in the new page. There seems to be some decent technical knowledge here. I'd like to see is anybody has an idea why this is happening.

So forgive me for dragging up an old oil thread, but this is the reason I found the forum.
I was looking for an answer to something that I can't explain, and google led me to this thread, which has had a decent technical component to to.
4 years ago, when i bought my RM 125, I was trying different oils (mostly an availability thing) and ended up with some Belray H1R. I immediately noticed a power increase. A significant power increase. I didn't believe it was possible, so I did some back to back testing. It was a very obvious, and very significant difference.
A few weeks ago, I ran out of the Castrol GP 2 stroke I've been using in my vintage bike, and my dealer had a deal on Belray MC 1. I tried it, mixed at the same 40-1 and noticed a significant power increase. Exactly the same as the above, I was able to duplicate it.
Both times it was Belray, and both times the difference was significant. If somebody told me the same thing, I probably wouldn't believe it. The first time I chalked it up to possibly jetting, or the way the oil contributed to combustion, but exactly the same result twice on 2 different bikes.

Can somebody explain what's going on?

[Swimr2DaResQ]

Maxima Castor 927 at 40:1 with a mix of 50/50 110 octane race gas and 92 octane pump gas. Love the smell of Castor, 31.5 hours on complete bottom end and top end rebuild with very minimal buildup. Great stuff.
I used Silkolene before the rebuild, full synthetic, not bad stuff, but not as good as Castor in my opinion.
 

[downonmonday]

Ooohhhhh yeah! I use 927 also.

[2T Institute]

So forgive me for dragging up an old oil thread, but this is the reason I found the forum.
I was looking for an answer to something that I can't explain, and google led me to this thread, which has had a decent technical component to to.
4 years ago, when i bought my RM 125, I was trying different oils (mostly an availability thing) and ended up with some Belray H1R. I immediately noticed a power increase. A significant power increase. I didn't believe it was possible, so I did some back to back testing. It was a very obvious, and very significant difference.
A few weeks ago, I ran out of the Castrol GP 2 stroke I've been using in my vintage bike, and my dealer had a deal on Belray MC 1. I tried it, mixed at the same 40-1 and noticed a significant power increase. Exactly the same as the above, I was able to duplicate it.
Both times it was Belray, and both times the difference was significant. If somebody told me the same thing, I probably wouldn't believe it. The first time I chalked it up to possibly jetting, or the way the oil contributed to combustion, but exactly the same result twice on 2 different bikes.

Can somebody explain what's going on?

Commonly called th 'placebo effect' If it has 'significant' power increases they dyno should ick that up no problems. The lowest oil ratio I ever use is 25:1 or 4%

[beaner]

Definitely not placebo affect. The difference really was that big, and I wasn't looking for it either time.

[Recovered]

is there any better thing for a man's senses than a 350 banshee running blendzall at about 32:1?  holy boner city.

the secret to keeping number plates nice is to stop buying those "shorty" silencers and buy the standard length fmf or PC one that sits flush with the sideplate.  shorties sound cool i suppose but its not worth destroying a number plate every 3-4 rides, especially when everyone is running pre-printed backgrounds that take a month to come in the mail.

[2T Institute]

Definitely not placebo affect. The difference really was that big, and I wasn't looking for it either time.

I find that very hard to believe. A before and after run on a dyno should be pretty easy.

[beaner]

Definitely not placebo affect. The difference really was that big, and I wasn't looking for it either time.

I find that very hard to believe.

So did I. Like i said, if somebody told me, I probably wouldn't believe it either.

[Kodackamera]

There is a test that can be performed with different oils called a "Power Fade" test...

[johnfritos]

got my first 2 stroke mx bike 2012 yz125    . had a yamaha blaster (hated it). but i got klotz benol castor racing 2 stroke oil at the dealer, a worker said he had a rm125 last year and he used that. but ivee heard that castor oil is bad ... not sure. but was thinking of the klotz oils the r50, or the super techniplate. what do you think. btw i ran 31:1 for about 5 practices.

[beaner]

IMO this is the best resource for that information

http://www.maximausa.com/tech-tips/oil-migration.php

Read the conclusions, and follow the recommendations. I think any of the major oils are fine. I am partial to Belray and Maxima oils, but from what I understand, Klotz is topnotch stuff. I use Maxima castor oil in my own 125 and my vintage bike.
You can't go wrong mixing 32-1 for your 125

[Swimr2DaResQ]

A little bit off topic but a good read none the less!
http://www.maximausa.com/lube-news/lubenewssummer2001.swf