What oil is best? and what ratio?

[Ron660]

Ill agree with that but my question is why does Klotz even @ 50to1 seem to leave more residual in the bottom than other oils at richer ratios? I cant remember the term for migration of the oil from the fuel and what determines how easily it does that but seems I remember reading somewhere theres an additive the companies use to aid in this migration from the fuel to the crankcase. Temperatue aids I know as the crankcase has to be warm enough for the fuel to evaporate from the oil and travel to the topend

I would say, only a guess, because of the very high viscosity. Motul road racing also has a very high viscosity, 20+, so it might show a similar residual in the lower end....maybe not. I'll let you check my 660's bottom end one day since I'm using 24:1 to compare.

 

[Ron660]

getting setup for a gas/octane test. I thought this was interesting. 89 e free lighter color than 91 e free. not sure what it means...if anything.

91

 

[Ron660]

The only oil I'll bash is stihl because I work on them and I no what it does.

I'll never let a picture on the Internet change my opinion on a oil. Because someone else said it's bad doesn't mean it is. Study it and use it the right way before you judge.

I've been told by a oil guru that 800 and h1r are drill bit lube at best, I've never ran them,I believe him but I'll find out for myself before I cast judgement.

The guys that are using stihl ultra, are any mixing more oil than 50:1? I'd bet ultra at 32:1 would lubricate satisfactory. I might try it but not in my expensive saws.

 

[Keith Gandy]

I would say, only a guess, because of the very high viscosity. Motul road racing also has a very high viscosity, 20+, so it might show a similar residual in the lower end....maybe not. I'll let you check my 660's bottom end one day since I'm using 24:1 to compare.

Theres 1 thing I am sure of. Oil that u see on the piston crown , combustion chamber, exhaust port, and muffler means less oil in the bottomend

 

[Ron660]

if your talking to me. uhh I'd say I just need mental help. Cuz what I am doing is borderline insanity. lol But thanks...I think. heh



deets and I are discussing building a giant cant for this oil test. Or it might just be easier to pay tree monkey to make one...he has the mill obviously and a good concentric wood to make one out of. I might need $ help on that. I've kinda exhausted my resources on this thing.

The longer the timed cuts are the better to lower the margin of error.

 

[junkman]

Ill agree with that but my question is why does Klotz even @ 50to1 seem to leave more residual in the bottom than other oils at richer ratios? I cant remember the term for migration of the oil from the fuel and what determines how easily it does that but seems I remember reading somewhere theres an additive the companies use to aid in this migration from the fuel to the crankcase. Temperatue aids I know as the crankcase has to be warm enough for the fuel to evaporate from the oil and travel to the topend

I would think because a saw does not produce enough hp to fully burn it,hopped up saws may be 7-9 hp, the bike that oil was made for produces 45-60 hp

 

[Ron660]

I would think because a saw does not produce enough hp to fully burn it,hopped up saws may be 7-9 hp, the bike that oil was made for produces 45-60 hp

What is the compression and operating rpms of a dirt bike?

 

[Keith Gandy]

I would think because a saw does not produce enough hp to fully burn it,hopped up saws may be 7-9 hp, the bike that oil was made for produces 45-60 hp

I think I can say though most mtronics/autotune saws u hardly see a perfectly clean sopping wet piston. I do believe thoso high viscosity oils resist combustion and the more u use the worse the effect. I think thats why Jason is seeing what he likes with Klotz @ 50to1

 

[CR500]

bikes do have a similar rpm per say.... but everything is on a bigger scale.

Compression can be high in race operations but again the size and stroke difference between a saw and bike are different. compare an 80cc saw to an 80cc bike.


The bike is in the realm of 25-30hp

A 390xp is about 6.5 HP

Bikes of course have different intake, carb and exhaust setups that make power, but when comparing to a saw they are worlds apart sometimes

 

[Ron660]

Theres 1 thing I am sure of. Oil that u see on the piston crown , combustion chamber, exhaust port, and muffler means less oil in the bottomend

I'm sure tune will also determine bottom-end lubrication. I'm also sure if someone is milling they'll tune richer.

 

[jake wells]

It's not messy but it's tuned properly and is 50:1. Mike ran it yesterday and he will tell you that even on klotz it still ran fine.
Smells good too.

Everyone that ran it said,what's that smell?

the smell of victory.

 

[junkman]

And the agony of defeat.

 

[bwalker]

A co-worker, which use to work for a large oil company, blended and tested 2-cycle oils. He said the amount of oil in the bottom-end was due to the QUANTITY of oil in your mix not the QUALITY of oil. If you want more oil in the bottom/lower-end, for example, increase your mix from 50:1 to 25:1. You're not changing the viscosity. Viscosity at 100C is viscosity at 100C.

And he is right. Also how the saw is operated prior to being shut down.

 

[jake wells]

i try to let mine idle for about a minute before i shut it down.

 

[Keith Gandy]

I'm sure tune will also determine bottom-end lubrication. I'm also sure if someone is milling they'll tune richer.

I agree. I think the amount of oil one chooses to use should be determined by load application and rpm of saw for that application. I do believe some oils migrate more easily than others to the bottomend and some combust more easily/ readily in the topend than others. I look for residual in the bottomend and that it combust in the topend and isnt hendering performance because its sopping wet in the topend in which the oil has migrated with the fuel to the topend and cant fully combust. Just my opinion and what I look for and how I run my saws

 

[Keith Gandy]

http://www.off-road.com/dirtbike/tech/two-stroke-gasoil-ratios-20502.html

 

[KenJax Tree]

Hello?!?!......knock, knock, anyone home?

 

[CR500]

Klotz.... this is alll

 

[Keith Gandy]

Kl 200 @ 40:1

 

[Keith Gandy]

Wheres Redbull? He is AWOL!! Actin like he has been testin and stuff for the last 2 yrs!!