Check your spark arrestors!

Gotcha. I was curious if they had experienced any failures on their own, or if it was something they had seen.

No doubt in my mind that Dominator should be #1 if being tested at super lean ratios (that saws were never designed to run at) as its Amsoil's answer to the hottest and most extreme 2 strokes. It is rarely recommended by Amsoil (or other oil experts) because most engines don't run at the temps needed to benefit from it... but I could see how it would easily come out on top in a test like this. I guess my basis for wanting to know the test variables, was to understand why which oils placed where they did, and I think I've pieced enough of it together to make sense of it.

The guy that did the test said that he's only ran a couple gallons of it under normal conditions, but I don't believe he's taken the engine apart to look at since. Even at that little of use, I don't think he would see any carbon or sludge build up that soon anyway. I maybe grab a bottle down the road just for a different smell once in a while lol.

 

And was just the dominator that did well the saber was right there with it and is an ope oil along with red armor Stihl orange made it into 300:1 couple hours. All tests were done with poulan weed eater
Trimmers that were cleaned and inspected for damage prior to each oil. It’s about as controlled as you can get without a lab and 100 brand new trimmers. Steve put a ton of time and his own money into this ocd project because we all got to talking and he wanted to know. I was pretty surprised the old orange bottle mineral oil beat the full synthetic pretty badly. And while the tree guys never lost a saw to oil for sure the dryer than I like to see bottom end could have reduced the life of the saw somw

 

When testing oil ratios, there is no control factor because you are testing the entire system. Oil ratios change the tune of the engine, which means tuning by tach is throwing off the results. If you end up rich by using the tach on a low oil mix, it will make the results look better. If lean, the results will be worse. With all the talk about running 30 or 40 to 1 and how close that is to the edge, I would think that 100, 200, or 300 to 1 would require even more care. Tuning for proper combustion ratio should be the only method of tuning employed when testing oils, since that is how an engine should be tuned anyway. If the oils can't holt up at that state of tune, then what good are they at that ratio? You don't know the tune when using a tach, only rpm.

 

Yes, I know that. I'm saying a guy doing the testing would probably tach them to keep them the same. It wasnt my test, I can't answer for him.

 

In the saw instance for ratio tests yes he would tach set to spec rpm on both saws running the 100:1
Mix.in the oil testing with the trimmers he used the same head with the same length strings to load the engines the same and tuned them for each mix oil then he kept tract of engine temps and rpm’s on each fuel throughout the test

 

And we all know that factory settings can burn up a saw. Mine almost burned up before I pulled the caps.

 

Running the specified gas to oil ratio in a stock saw at stock settings will not burn up a saw unless something else happens to cause a lean condition.

 

For me, what Steve’s oil tests did was got me away from using an oil that does this at 45:1….It’s JASO FD rated.

 

45:1 with a much better oil, this saw had a brand new top end on it when I purchased it with less than 3 tanks through it by the builder. I’m on tank 10 or 11 now…

 

And the saw manufacturer knows what the air fuel mix is at a specific rpm so it’s a safe tune

 

Well, this took a turn after I left last night. I apologize to the op, LordOfTheFlies , and to anyone else that may have been put off by something I said here. I posted those JASO documents and my reasons for not using the rating system to gauge oil quality, as an informational post only. It was not meant to be nasty or start a war. Again, my apologies.

 

Just another ol mix oil feelings thread fatality.

 

These things happen from time to time. No worries !
Seems like things in person are better than over this darn internet. It's easy to misinterpret...or assume...or miss-gauge an attitude online !

 

Agreed.

 

I wish I could heart react this. Part of the reason I dont like forums! Great people on here, but its so easy to misconstrue what you are trying to say. 100% guilty!

 

No need to apologize.