SXR What's the best way to run in a fresh 2 stroke motor

[Cannibal]

If the synthetic oil thing was true, why would most (if not all) high performance cars come with it from the factory?

Just to add, Art recommends 50:1 Dominator from breaking on. And not to run extra oil because you WANT the rings to seat.

If you believe the whole synthetic break in thing, why would you run more conventional oil? Wouldn't that just be more oil on the cyl preventing the rings from seating? If you want friction, why not run less oil, like 60:1 for the first couple tanks? If you are not working the engine hard, why do you need extra lube? Seems contradictory to say synthetic is too slippery then add more conventional oil.

 

[#ZERO]

If the synthetic oil thing was true, why would most (if not all) high performance cars come with it from the factory?

Most high performance car manufacturers recommend synthetic oils after the break-in period.

 

[Cannibal]

I've worked for BMW, Ferrari, Maserati and worked on many other high and VERY high performance cars (Porsche, Lambo, etc). They come right from the factory with synthetic. Porsche with Mobile 1, BMW has switched between Pennzoil and Castrol, Ferrari is Shell Helix, Masertai uses Agip.

You could be referring to American performance, I can't comment on that.

 

[Matt_E]

I broke in my ADA1000 on Dominator. Rings seated, compression went up.

 

[the WaTeRhAwK]

Synthetic oil does not let the rings sit in and form to the cylinder walls like convention oils.

=

slow breakins can glaze your cyl walls

The high ash content in convention oils allows it's filming strength to break down faster than full synthetics, allowing the rings to seat into the bore properly. Synthetics have such a high film strength that the rings cannot seat into the crosshatch lines in the bore, and instead will tight-hone them forming a glaze. That's why top ends run on full synthetics last longer than a top end run regularly on high ash content oil.

 

[Cannibal]

I broke in my ADA1000 on Dominator. Rings seated, compression went up.

 

[the WaTeRhAwK]

Not raggin' on ANY engine builders, but most professional builders worth their salt at their profession will tell you that breaking one in on full synthetics is a no no. :nono:

 

[Matt_E]

Great. I did it anyway and look what it got me

 

[the WaTeRhAwK]

Well, at least we don't have MrSki in here telling us to "Just take it out for 5 or 6 45 second sustained WOT runs, and you're done."


lol


Matt, are you referring to your avatar?....lol

 

[Matt_E]

Lawlz

 

[the WaTeRhAwK]

...

 

[the WaTeRhAwK]

Cannibal, Two strokes are a completely different animal when it comes to break-in, vs. 4 stroke automobile engines, i/e lower compression, lower heat/friction, rpms, etc... 4-strokes generally have a lot more rings, oiler rings, etc.. on the pistons, where two strokes rely on one or two rings, it's just a completely different setup and necessity for seating into the bore.

 

[Cannibal]

Cannibal, Two strokes are a completely different animal when it comes to break-in, vs. 4 stroke automobile engines, i/e lower compression, lower heat/friction, rpms, etc... 4-strokes generally have a lot more rings, oiler rings, etc.. on the pistons, where two strokes rely on one or two rings, it's just a completely different setup and necessity for seating into the bore.

You are right, and I understand that, but it is still said over and over again on car forums.

I'm far from an engineer, and I can not prove one way or another. A lot of what is spouted is internet folk lore with some specs of truth. It's my nature to question everything......and sometimes I just like to stir the pot.

But, my question still stands:

Why would I not use synthetic because it lubricates too well, but add more conventional oil (25:1?) to add lubrication?

 

[the WaTeRhAwK]

filming strength. The weakness of the ash content film is where the break in occurs.
I understand that you mean by lessening the oil to fuel ratio, you are attempting to achieve the same results as a high ash content oil with a weak film strength, but you are much safer running the recommended ratio of the engine in question with conventional oil. One main reason right off the top of my head would be that running full-synthetic at a lower oil to fuel ratio could cook the engine? :dunno: Theoretically what you're saying makes sense, but the price of an engine isn't worth the experiment and the questionable results IMO. just saying.



example: If you were to run 100:1 Amsoil dominator at 150 or 200:1 trying to achieve the same results for break-in, I would say you're risking the engine...lol :dunno:

 

[scotts2t]

Dominator is a 50:1 mix ratio and it works great for everything including break in sessions!

 

[Matt_E]

Cannibal, Two strokes are a completely different animal when it comes to break-in, vs. 4 stroke automobile engines, i/e lower compression, lower heat/friction, rpms, etc... 4-strokes generally have a lot more rings, oiler rings, etc.. on the pistons, where two strokes rely on one or two rings, it's just a completely different setup and necessity for seating into the bore.

Hey bro.....two strokes went to double rings two decades ago

 

[the WaTeRhAwK]

Dominator is a 50:1 mix ratio and it works great for everything including break in sessions!

I think there may be two different types of dominator, and the 100:1 dominator is no good for break-in, as it is a full -synthetic, and very high film-strength oil.

Hey bro.....two strokes went to double rings two decades ago

You can still purchase single-ringed pistons for two-strokes, bro. :biggrin:

 

[WFO Speedracer]

You guys are too much !

 

[the WaTeRhAwK]

yeah, but we're good at it. (whatever it is.. :dunno: )

 

[scotts2t]