Jest how many quarts of Klotz did you buy?   I assume you are gonna use it all up so you will be reporting total useage over the entire time span.

Hey, at the rate you bleed oil you really don't need to be making any oil changes, just an occasional purge at oil filter change time.

From your description, you are using about a quart of oil every thousand miles. You are also reporting oil temperatures generally under 200 F; and head temperatures not a lot higher. With the oil flash point reported as being well over 300 F, I doubt the oil is evaporating or boiling off. I think the engine is burning it. Depending on your fuel mileage, that's about a quart for twenty to twenty-five gallons of gas, or call it 100:1 mixture. If a two-stroke burns a 100:1 mix, you have to watch closely to see any smoke. I've been wrong before, but that's my guess.

Cylinder wall losses, rings and valve seals, air borne particles exiting the crankcase pressure bypass system up in the head.

While it is true all our bikes do lose less oil in wintertime and more in the summer, it still has to take one of these exit pathways.


Hummmmm .....   for the shits and giggles of it how about replacing the metal screening in the head bypass area with a much finer mesh something (like a rolled up fabric or a felt for example) just to see if it makes any difference?   Might make it a lot worse if pressure could build up inside the crankcase -- mebbe this could be a very bad idea.

Other than that, fresh valve seals and new piston rings and a hone job on the cylinder wall?

I bet you got very little remaining cross hatch and your rings are well worn by 25,000 miles.



"Excuse for high compression 97mm piston have you" sez old Yoda.

verslagen1 wrote on 08/31/10 at 09:54:50:

How much oil do you find in your airbox? Whenever I drain the airbox, about once a month, I get about 3-4 drops diluted in water.
Also about oil consumption: I usually use about a shot glass full every 1,000 miles in summer. That's with 20W-50 oil. Recently I did a few trips with my wife at 80-90 miles an hour most of the time in 95 degree heat, and that's when it used more like 2-3 shot glasses full. But imagine how hard that motor had to work doing that. I do not ride like this most of the time. I change oil every 1,500 miles. I don't care about the cost, it makes me feel better, because of the heat that motor produces, especially in Oklahoma summers. It won't financially ruin me, but a blown motor would. Whether it's isn't necessary, doesn't matter. When I drain it after 1,500 miles it's quit dark and looks like it needs to get out. That is the same no matter what brand I used.

I don't exactly know what's considered normal, but that sounds like quiet a bit for 2 weeks. I don't mean to sound offensive, but it looks like that motor could be a tad worn out. Does it still pull strong though?

Hehehehe I have the same kind of "Test Track". It is US69 going north with real nice smooth concrete with concrete barrier on the median with those green vertical slates or whatever you call it on top. And lake most of the way on the right side. 20 miles like that. Other than from the air, almost impossible for cops to catch you. Even if they come from the opposite direction and they could manage to radar or laser you, they couldn't even turn around. Anyways, it's got a long 5 mile stretch that is completely flat, and a hill like yours where she barely makes it to 85, if you whip her ass real bad. Now the only problem is the wind, because here it usually does around 15-25mph from the south most days. That is where it gets really interesting. Going north with that wind in the back I once had to back off around 97mph, turning about 6,700rpm. It kept going, but I quit there, because i was afraid to blow the motor. That was on the flat stretch. Turned around and she struggled to make it to 90mph. Indicated about 88mph, and the wind pressure in the face was just nuts! Like I said, the wind is the problem. Every now and then I catch a calm day and she will do about 93mph either way, except the hill will not allow more than 85mph. That is about 20 miles one way, and after some of those test runs with the high wind at full throttle the whole time I manged to blow almost 3/4 of the tank! And the funny thing is, that she actually feels pretty stable doing speeds like that. I can do 55+ miles a gallon if I ride relaxed and at speeds 20-30mph below that, but IF I get on it hard then she starts drinking like a horse!  

the bikes all stock except for the muffler and the main jet.

started our with the rotdino, not looking back.  especially not during the summer.

Somehow, I suspect that oil consumption will not be greatly affected by the type of oil, conventional or synthetic, unless there is a major difference in oil evaporation at normal engine temperatures. My suggestion of trying Rotella conventional 15W-40 was more from curiosity about temperatures than consumption. It seems from Verslagen's posted data that consumption of 5W-40 and 15W-50 is about the same, but temperatures differ.