Stihl Break-In

[Andyshine77]

Anyone seen how they brake in new motors cycle engine for mini sprints ?

They run a different oil in them a brake them in

Then they change the oil to a synthetic oil

I could be wrong, but from what I know, the break in oil you're talking about has a thermally unstable compound in it. This aids in seating everything rapidly, it has nothing to do with oils being synthetic or not. Most think syn oil is slicker than non syn oil, so break in takes longer. This is a misconception, syn oil for the most part is simply more stable and cleaner. This applies to both 4 and 2 cycle oils.       

[H 2 H]

Anyone seen how they brake in new motors cycle engine for mini sprints ?

They run a different oil in them a brake them in

Then they change the oil to a synthetic oil

I could be wrong, but from what I know, the break in oil you're talking about has a thermally unstable compound in it. This aids in seating everything rapidly, it has nothing to to with oils being synthetic or not. Most think syn oil is slicker than non syn oil, so break in takes longer. This is a misconception, syn oil for the most part is simply more stable and cleaner. This applies to both 4 and 2 cycle oils.     

That's my point it takes longer to brake in a motor with synthetic oil

[Andyshine77]

No it does not. Again syn oil is simply more stable, it's not slicker.

They use break in oil because they don't have time to do so, break in oil works extremely fast. The thermally unstable compound is a fine abrasive that breaks down at a specific temperature, so they don't have to flush the engine over and over.   

[Al_Smith]

Well I work in an automobile engine plant and actually when they used "break in oil " it was oil with a tacking agent .I have no point to prove and no reason to BS anybody.

Now of days new engines because of the tighter tollerences are shipped with 5w20 semi synthetic . When I go back to work this Wed. I can even get you the tox number and who makes it .

[H 2 H]

No it does not. Again syn oil is simply more stable, it's not slicker.

They use break in oil because the don't have time to do so, break in oil works extremely fast. The thermally unstable compound is a fine abrasive that breaks down at a specific temperature, so they don't have to flush the engine over and over.

So your saying synthetic oil breaks in a motor faster than break in oil ?

They will run those motors on the dyno to break them in with break in oil in them

Been at this game (mini sprint) for many years and seen them building motors; how many years do you have at building motors ?

[Al_Smith]

 :D To fuel the fire let me say something .When I rebuild an engine ,chainsaw,lawnmower ,tractor whatever ,I put enough  oil on the cylinders it smokes for 5 minutes .Chainsaws I use 30 WT motor oil .4 cycles I use STP .So there lah te dah  8)

[thecfarm]

Al why not use just use synthetic oil.

[Al_Smith]

Why not use KY jelly ,it's synthetic  in a manner of speaking< --right under the wire again good ole Al hit a home run again ;D 

[H 2 H]

:D To fuel the fire let me say something .When I rebuild an engine ,chainsaw,lawnmower ,tractor whatever ,I put enough  oil on the cylinders it smokes for 5 minutes .Chainsaws I use 30 WT motor oil .4 cycles I use STP .So there lah te dah  8)

Me to  ;D

[ZeroJunk]

I have used synthetic for the last twenty years in everything, even lawn mowers, pressure washers, etc. As far as multi viscosity motor oils I think the big thing is that they maintain there multi viscosity longer. As far as two cycle oil I think the big thing is that it burns cleaner leaving less carbon residue. I don't go through any break- in process on a chainsaw. It is a little like break-in on a rifle barrel. You can believe whatever you want, but it is hard to prove anything.

[Al_Smith]

Well what the hey a guy who's  been around race cars for decades and a nutty ex sub sailor a half a bubble out of plumb .Why argue .--my wife asks me why I act this way--it's not an act . ;)

[H 2 H]

Well what the hey a guy who's  been around race cars for decades and a nutty ex sub sailor a half a bubble out of plumb .Why argue .--my wife asks me why I act this way--it's not an act . ;)

I've been around racing since 68 been really in to sprint cars (full size and mini sprints) 25 plus years been on teams doing just about everything there is to do with them. Worked on some healthy motors (sprint cars and mini sprints) helped put motors together and then running them on dyno to the wee hours of the morning 

[Andyshine77]

No it does not. Again syn oil is simply more stable, it's not slicker.

They use break in oil because the don't have time to do so, break in oil works extremely fast. The thermally unstable compound is a fine abrasive that breaks down at a specific temperature, so they don't have to flush the engine over and over.

So your saying synthetic oil breaks in a motor faster than break in oil ?

They will run those motors on the dyno to break them in with break in oil in them

Been at this game (mini sprint) for many years and seen them building motors; how many years do you have at building motors ?

I specifically said break in oil works better and or faster. However there is no difference between syn or non syn oil during normal break in when time isn't an issue. Maybe I can't explain myself clearly, but I thought I did fairly well.

[Andyshine77]

Well what the hey a guy who's  been around race cars for decades and a nutty ex sub sailor a half a bubble out of plumb .Why argue .--my wife asks me why I act this way--it's not an act . ;)

And how many times have I beat you in cant racing? I now have quite a few runners out there and you know it, you've ran them.

Sorry Al, not trying to be mean, but you know I've been around the block a few times myself, and you know that as fact old friend.

[Al_Smith]

On the cants--never ,when did that happen? I don't remember anybody using a stop watch in several years other than playing around and never one on one since I ran at Chardon.Fact I don't remember even cutting any cants for several years in a compeatative situation.Maybe just playing around a little .

Now Andy this is not implying you don't have some runners .Most likely you did have faster times than I but it was never heads up one on one .Never the less what's all that got to do with oil in the first place ?

[H 2 H]

Andy you just wanted to argue about it

I feel really bad im not a cant racer

"And how many times have I beat you in cant racing? I now have quite a few runners out there and you know it, you've ran them.

Sorry Al, not trying to be mean, but you know I've been around the block a few times myself, and you know that as fact old friend."

[Al_Smith]

Well what the hey I'm not a cant racer either .I build high torque work saws and restore antiques .

3/10ths of a second faster on an 8 inch square chunk of green poplar means very little other than it cuts square wood faster .It's fun but in the real world it means very little in a day in the woods with wood with bark still on it .

[Al_Smith]

Moving right along and attempting to keep on target back to Stihl break in .
I've only owned two new saws but I've ran a bunch that belong to tree service companies as I help out with two of them with their equipment .

Generally speaking after a few tanks of fuel they perk right up .Keep in mind though everything is nice and round and within factory tollerances so it doesn't take long to "wear in " .

Now comes a rebuilt with a used cylinder and piston with new rings .Things appear to be round and without taper in the cylinder but it really isn't .They will come in as good as new but it takes a lot longer to break in .In other words it's wearing in as it's wearing out ,kind of .

[ZeroJunk]

I just started rebuilding saws last week. Don't need one, just like to cut cookies. I didn't do any special break in on this one and it is still running. Got about 1/2 a tank through it.

[Andyshine77]

Andy you just wanted to argue about it

I feel really bad im not a cant racer

"And how many times have I beat you in cant racing? I now have quite a few runners out there and you know it, you've ran them.

Sorry Al, not trying to be mean, but you know I've been around the block a few times myself, and you know that as fact old friend."

No argument intended, I think you may have simply misunderstood the context in some of my posts.

Marry Christmas.

[Al_Smith]

Oil has gotten better .Things are built to tighter more accurate fits etc .Not too long ago new automobiles were indeed shipped with break in oil .You kept the speed below 65 say and changed the break in  to regular oil and put the hammer down after about 500 miles .

Now of days you just get in it and go .Change the oil after 3000 miles and go again .After say 10,000 it goes to 5,000 miles between oil changes .

They might talk about the "good old days " but quite frankly these are the good old days by comparrison .

[Andyshine77]

.Never the less what's all that got to do with oil in the first place ?

You and H2H were asking about my experience in an attempt to discredit what I was "trying" to say, I answered.

I've done countless hours of research on the subject at hand, and some testing of my own, but nothing scientific obviously. When talking about breaking in a saw, as others have already said, simply run the saw, any approved oil will do just fine.

[Andyshine77]

Oil has gotten better .Things are built to tighter more accurate fits etc .Not too long ago new automobiles were indeed shipped with break in oil .You kept the speed below 65 say and changed the break in  to regular oil and put the hammer down after about 500 miles .

Now of days you just get in it and go .Change the oil after 3000 miles and go again .After say 10,000 it goes to 5,000 miles between oil changes .

They might talk about the "good old days " but quite frankly these are the good old days by comparrison .

Sounds about right to me.  :P

[Al_Smith]

.Never the less what's all that got to do with oil in the first place ?

You and H2H were asking about my experience in an attempt to discredit what I was "trying" to say, I answered.

   

Andy Andy Andy .I think you are getting a little thin skinned in your old age .Tell me this though since you brought it up what does cutting cants have anything to do with oil or breaking in a saw ? For the record also I might add I've been outcut my somebody else running my saws .I can build them I never said I could run them . ;)

[Andyshine77]

Al I'm not going to go ten rounds, have a good one.