2 Cycle Oils

[Madman393]

What do you run and why? What ratio have you settled on and found to work the best for you?

[Florida 393]

For John's CR 125R we run Honda HP 2 synthetic, with good results. we are mixing at the recommended 32:1 ratio. The main jet was leaned out one step. Very clean running for a pre-mix, and it does not foul plugs constantly. I'll post more when we do the top end rebuild next week.

I personally ran Bel-Ray MC-1 when I rode 2-stroke bikes. Very clean burning with little or no deposits on the electrode. Forr hard down competition I have run a castor based oil. They run sooty but are very good for cylinder protection.

Do some research at the various web sites for the oil makers and in the magazines.

Bill

[Madman393]

When I first got the 500 in August, I started with Red Line synthetic and was pleased with its lack of soot and gunk. However, one day I ran low and had to borrow some premix from a friend. He runs Klotz Benol. The 500 loved it, but it pumped out the gunk that I remembered when I raced in the 80's. As a compromise, I have now switched to the blend--80% synthetic and 20% castor. It runs good at 44:1.

[Keetoman393]

I always had great luck with the Motul Synthetic oil. In Trials, we ran at 100 to 1 ratio and this oil ran perfect. I know a lot of people that ride Nationals and this is their choice.
I have also used the Klotz before but had problems fouling plugs if you don't keep it reved up and burned out. Sure smells good when mixed with 108 gas

Keith

[FFRacing]

Have always thought bean oil to be the absolute best lube available...till the advent of exhaust valves. A bit gummy but still a very good lube. If you don't mind the almost weekly maintenance, I think it is still the best!
Second on my list is Silkolene Pro2...FFR rebuilds about 150 2 stroke motors a year...has had fewer oil related failures with customers who use it. It adheres very well, especially in the higher rpm tiddlers.
Just my opinion...TW

[Thormx332]

I run Bel-ray at 32:1 and it my CR 125 runs fine

[KTM250rm393]

I used to be a strong Yamalube 2R user until I read so many great post about Mobil-1 MX2T full synthetic and I switched a year ago and love it. It runs $3.49 a pint and I mix it 40:1 in my 2000 KTM250exc.

The only disadvantage is you can only find it at Auto Zone auto parts.

[Dell30rb]

I'll second that Mr. Rick.

I use mx2t also. Great stuff, and the price cant be beat.

[Madman393]

Originally posted by dell30rb
I'll second that Mr. Rick.

I use mx2t also. Great stuff, and the price cant be beat.

I might have to look into that! I have been paying twice that for what I have been running--oh, wait I buy it in quarts.

[CR250man]

When I bought my 98 CR 250 2 years ago, the guy used Maxima Super M at 36:1, and said he never fouled a plug. So, I resumed using that and I have yet to foul a plug in this bike. Heck, I'm noit even sure what plug is in there since I've never had to take it out. Bike runs great too.

I, like Rick, used Yamalube 2R in all our 2 smokes, but now they all use Super M (98 RM 80, 92 KX 80, 2001 KX 65) and they appear to run real clean with no build up.

Yeah, it is pricey, but I feel secure with it in my bikes.

[Dell30rb]

You really should replace your plug every 6 months regardless. After awhile, the electrode will wear down. You cant see the wear, because its the electrode edges rounding off instead of being sharp.

[CR250man]

Yeah....I would normally change them after a year (if they don't foul), considering I don't really ride as much as I like to. I have probably put about 40-50 hrs on my bike since I bouight it in August of 2000. I only rode two twice since June of last year and I haven't cleaned my bike up since the last one in October (VSTA's Loretta Lynn ride), and plan to do it this weekend, since I did do all the boys bikes.

I guess I'll pull the plug and replace it.

On another note, my bro in law bought a '03 KTM 450 e/xc a few weeks ago and I tried it for the first time yesterday close by the house and man, this is one sweet bike. Gobs of power everywhere and didn't feel that heavy at all. These bikes have come a long way!

[Rockey]

I also use MX2T. I love it, the cleanest top end ever! Great lube too, I had my bike over heat due to a broken impeller, and it didn't sieze, although it should have. It lost power gradually, and then I felt the excess heat. I was impressed.

[2fun]

I am personally hooked on the Amsoil 2000 fully synthetic 2-stroke pre-mix oil.

I run it at 50:1 (actually 48:1 if I use 16 OZ to six Gal of gas).

It doesn't seem to leave any build-up, burns clean, and the motor still gets plenty of oil as I have witnessed it dripping off of the crank even at 50:1

It actually saves me money by being able to stretch the oil out over more gallons of gas than did the Golden Spectro (semi-synthetic) that I used to use @ 40:1

I had no problems with the Golden Spectro either, but I felt that the fully synthetic Amsoil would give better protection than the semi-synthetic Golden Spectro.

I know of people who have run the Amsoil @ 100:1 with no problems, and some of the Amsoil reps run it @ 150:1 but that getting a little lean for my taste!:

[Rockey]

I think running an oil that lean is nuts, how can 150:1 be enough oil to adequately coat the cylinder wall, crankshaft and crank bearings? I think that 48:1 is ok in a 500 or a 250 is the oil is high quality, butin a 125 I reccomend no lower than 32:1.

[CR250man]

Rockey, I can understand your skepticism to those using amsoil at this ratio. I know of someone who used 100:1 in his KX 250 and rode it hard...no problems. I personally would not do it, cuz I get the jitters (and ain't loaded with bucks, either), but I have yet to hear of one claim of a blown engine due to amsoil being used at such a ratio.

I agree that it is insane, but if the motor hums along and has no problems, then I see no harm. I'm only guessing the reps are just out to prove just how good their oil is, however insane it may sound.

[2fun]

Originally posted by CR250man
I agree that it is insane, but if the motor hums along and has no problems, then I see no harm. I'm only guessing the reps are just out to prove just how good their oil is, however insane it may sound.

I agree the reps are probably trying to make a point, and like I said, thats a little too lean for me as I run it at 48 to 50:1

Perhaps we don't know the capabilities of these newer oils based on our knowledge of the limitations of the older oils we are accustomed to?

Maybe we need time to adjust to the superior lubricating capabilities that these newer oils can provide?

I don't know. I'm sure time will tell.
Like you said, if no motors have blown at these ratios, maybe this will be a standard for future mixing ratios for oils of this higher quality.

One other thing that comes to mind though is also the fact that the oil helps to provide the ring/cylinder seal. This also helps to increase H.P.

So I do believe there is a fine balance to not just what one can "get away with", but also what ratio will provide adequate lubrication while also providing for a good ring seal. :

[HiG4s]

Amsoil themselves will not reccommend higher than 50:1 on a motocross bike. Their 100:1 oil is for outboard motors and trials bikes.

In 2-stroke cart racing, dyno testing has shown that with proper jetting cart engines make the most hp when mixed 16:1

[2fun]

Originally posted by HiG4s
Amsoil themselves will not reccommend higher than 50:1 on a motocross bike. Their 100:1 oil is for outboard motors and trials bikes.

In 2-stroke cart racing, dyno testing has shown that with proper jetting cart engines make the most hp when mixed 16:1

Thanks for the info HiG4s.

I have heard similar things about the best H.P. figures and oil ratios that you mentioned.

If you can find these dyno charts, or info, please post a link to them here if you would.

Also, welcome to ATM if you haven't already been welcomed!

[Rockey]

From what I have read, 2 smokes make best power at 18:1. I really don't see the point in mixing 100:1 at all. You spend the same money for the oil as at 32:1, but there is less of it to protect bearings, lube piston, seal rings, etc etc. Your bearings won't last as long, there will be more wear on the engine. You will spend more money down the road.

I'll stick to my nice and polluting 26:1 ratio w/ MX2t.