Wow great for the input guys. There is some awesome amount of great here say here. My vote Towards Pablo & Dax. Keep us posted! Lovin this! Oh yeah guys its a family forum.
I was going to say, you were just getting on it more.Well tbh I had not the courage to try the 100:1 Amsoil (well, actually I couldn't find any heh), but I did switch to the Amsoil 50:1 flavor...
Mine lil MB got a bit hot and bothered by it. At the recommended 50:1 ratio, after zipping about for a bit and bringing her home to check things, I shut her down and was serenaded by quite a LOT of metal contraction noises. I don't need a temp gauge to inform me that I had just abused my motor a bit. Usually after a ride I'll get a "ting" or too as she cools, this was a veritable symphony of complaint. However...
While I was riding, I noticed she ran a lil smoother - not ignition mind you, that hadn't changed, but the high vibration had smoothed a bit and this was particularly noticeable at top speed. I said "hmmm " So I drained the tank and mixed up a batch at the good ol 32:1 and sure nuff - she loved it. At max RPM she doesn't quite sound like she's about to explode in a shrapnel cloud of recycled beer cans, the piston head and plug base are no longer black and gooey, and it may be just the weather (planets lined up, equinox, third Tuesday of the month, w/e) but I seemed to have gained a solid 1.5 MPH.
Yeah... I know... a WHOLE 1 mile per hour OMG w00t! Well, as fellow MBers I figure y'all understand how much even that means lol Actually, as a blowboater (sailboat fer u landlocked types) that has a normal top speed of a whopping 12mph or so - I'm used to this "fractional gain" game
Silver B,Tom,
You and I both tried the opti 2 on older engines. Mine was a dax with over a thousand miles on it and it improved in smoothness and power in just a couple of miles. I love it as the old motor has never run better. Why the difference in our experiences... yours worse and mine better? One obvious difference is that I had been using a synthetic since day one, Amsoil Sabre Professional. So maybe yours broke in differently than mine (or as someone suggested about synthetics, they never really break in at least in the traditional sense). I don't know, but if someone has been using a synthetic I doubt there will be any adverse effect from running opti 2 in an older engine. Just a guess. I am sold on the opti-2, quite a lot better than amsoil in my experience. I'm glad it worked out for you with the other two motors.
Silverbear
Okay, I'm back with some info and a warning. This is a discussion about oil, not grammar or spelling. If we can't have a civil discussion I'll shut it down. That's my prerogative.
There's no reason for auguments. Differences of opinion are expected but not anger over them.
With that said here's where I stand with the Opti-2 experiment.
The high milage engine doesn't like it. I have some theories but that's all. I've tried it three times and did comparisons between my old oil mix which is Stihl 2 cycle oil and the Opti-2. All three attempts resulted in a decrease in power and speed but when I go back to the original mix the engine regains its previous performance level.
Now...the other two motors: Both are Dax 80s, one is very low milage, under 100 and the other is in between the three with just less than 500 miles. Both of these engines display a marked increase in power on the Opti-2 mix. Not just barely noticable but a marked increase. The 500 miler used to top out at about 28mph on the only flat area near my home. It will now do that same stretch at 32 with ease and sounds better than it used to. The power is smoother and more consistant. I do not feel that this engine is suffering from a lack of lubrication but I assume only time will tell. I've put about 165 miles on the motor using the Opti-2 mix and so far it has shown no signs of coming apart, running hot or making any strange noises that you'd expect from oil starvation.
The low milage motor is probably still in the break-in stage even with 100 miles on it because I typically treat my engines easy and don't abuse them. It has been my experience that running them like I do my break-in is a little longer than some. This engine, like it's higher milage brother is also running smoother and stronger on the Opti-2 oil. I was able to discern a difference rather quickly after the first tank and subsequent running has proven to display the increase in power and top end speed.
The high milage engine has a little over 1500 miles on it and runs strong and smooth on Stihl 2 cycle oil mixed 32:1. I have a 48T sprocket on this bike for the hilly neighborhood where I live and it will top out at about 26 mph on the Stihl oil. If I give it Opti-2 my top end is somewhere in the mid teens and I have to pedal up hills that it typically climbs unassisted at 20mph.
Theory: Something to do with the piston rings' inability to seal properly with the Opti-2. Even though the engine feels as if the compression is good there might be something about the Opti that is just too slick, for want of a better term, to allow the rings to seal and under load allows some blow-by. This is just a theory but it is the only one that makes sense to me at this time. To clear up a misconception that I've read here; the Opti-2 is not "thick as molasses" but in fact displays about the same viscosity as any 2 stroke oil that I've used. When mixed as per the instructions at 1.3 ounce per gallon of gasoline the mix is not any thicker than regular 2 stroke mix. It's apparent that the lubricating abilities of the Opti are very good but maybe too good for a high milage engine with some wear on the cylinder walls and rings and will not allow for proper ring seal. Just my theory.
Conclusion: The old motor will get regular 2 cycle oil, probably the Stihl that I've always used and the other two, and probably any future engines will be run on the Opti, obviously depending on what happens as time passes and the miles accrue. I'll report it if there's problems. Oh, by the way, Dax cringed when he rode one of my Opti-2 bikes a couple of days ago. He is not a believer. "Go to 50:1" He said. Sorry, Duane.
Tom
It should be noted that less oil causes motors to run cooler not hotter. I've verified this on Rotax UL engines, HTs, and weedwacker friction bikes with IR thermometer. All the way down to zero oil which ran the coolest. The do blow w/o oil but not because of engine heat but rather localized seizure due to lack of lubrication.
I was going to say, you were just getting on it more.
I was also skeptical that less oil runs cooler when I ran across that in more than one of the Yahoo ultralight and engine forums. Personal experiments showed it was true. I suggest trying the popular 16:1 mix and then 100:1 with IR thermometer handy.edit: again no offense, but I've now searched for anything to substantiate xlite's findings and I can't seem to find anything - could ya maybe point me in the right direction? I'll never get this past my technician friends elsewise
Bill,Well, after following this thread from the beginning, I grabbed a bottle of Opti-2 off the shelf at the local mower shop. When I got it home, I looked closer and it says "Injector Lube". Not much info on the label. It says use it straight in oil injected engines, and for pre-mix use manufacturers instructions. The website is not really very informative and I couldn't find anything about 100:1, even for the regular stuff...
Guess I'll mix it 16:1 to start with. My engine is still new (got to find time to finish making my hub adaptor) so it will be getting the Opti from the very beginning. I'll let you know how it worked out, eventually, just not sure if this version works the same as the Opti-2 discussed here.
On a different and maybe crazy note, has anyone tried model airplane fuel in one of these engines? I have a couple of gallons of 15%nitro I got free and have no other use for. Maybe I'll try it in my Kinetic, no loss if that thing blows up. ;-}
Cheers! Bill KU4QB
We'll await your report. Don't keep us in suspenders for too long...Ok, I've bin done gone and bought me a bottle of Opti-2; the aus deal is $27au for 1 litre - somewhere around a yankee dollar tarrif of say $20us for about 33 ounces. Nice two chamber measuring bottle.
Product description - simply 'Opti-2 2-cycle engine lubricant' -nowhere does the bottle labelling say "100:1" ...ROFLMAO
The promoters must think that we aussies are not quite ready to confront the awful maths implicit in the instructions that "the proper mix is 1.3 ounces per 1 US gallon or 4 litres of fuel"
Thats 100:1 alright ....and 100:1 is the strength that I have mixed myself... so i'm off out ... (the stuff seems pretty average viscosity vs the ordinary 2-stroke oil in the mix that I've been using; for the record I've used 5 litres of fuel mix in the engine since new ... mixed at 16:1 for the first litre, 20:1 for the next three litres and 32:1 for the final litre so far burned in my engine.)
Don't use what you have...It's not the Opti-2 we're talking about. Return it to where you bought it and get Opti-2, 2 cycle lubricant. Check the photo below. That's what you want. Hope I caught you in time.Well, after following this thread from the beginning, I grabbed a bottle of Opti-2 off the shelf at the local mower shop. When I got it home, I looked closer and it says "Injector Lube". Not much info on the label. It says use it straight in oil injected engines, and for pre-mix use manufacturers instructions. The website is not really very informative and I couldn't find anything about 100:1, even for the regular stuff...
Guess I'll mix it 16:1 to start with. My engine is still new (got to find time to finish making my hub adaptor) so it will be getting the Opti from the very beginning. I'll let you know how it worked out, eventually, just not sure if this version works the same as the Opti-2 discussed here.
On a different and maybe crazy note, has anyone tried model airplane fuel in one of these engines? I have a couple of gallons of 15%nitro I got free and have no other use for. Maybe I'll try it in my Kinetic, no loss if that thing blows up. ;-}
Cheers! Bill KU4QB