ORIGINAL: SAL98
It's really funny because no one has yet to answer a simple Question, What is the scoop?
I have a new DL50 in my Wh Sukhoi that is just ablout finish its breakin oil. Lawnboy at 32:1. I was adviced by DLUSA to run Amsoil Sabre Pro at 100:1 like the DA guys do. I never own a DA but All my Imac buddys do and they all run Amsoil. I never ask them questions regarding oil because I assumed they ran what DA recommended, and they all had there engines running fine season after season. The engines I did own were ZDZ, Evolutions, BME and MVVS. These were all run with Penzoil for breakin and either Mobil1, Redline, or Belray mc-1. Forgive me for not being in the know with this issue. I was just hoping that if I had been misinformed about something that you guys would be a help to me as I try to be to others and now just critics.
Sal,
There are only a few engine companies that actually stress test an engine and it's oil. Fewer still that test just the oil, and generally only long enough to see that the oil meets minimum standards for the duration of the testing period. DL is not any of those, nor was BME, Taurus, or Brison. DA, Herbrandson, and 3W get their engines tested indirectly via uav companies using the products in various enviornments over very long periods of time in extremely diverse conditions. I don't have a clue what goes on behind the doors with ZDZ or MVVS. I doubt (but don't actually know) that Chinese engine manufacturers have any type of ongoing oil analysis programs that cover their products.
Those that seriously test engine oils under high stress conditions will not use Amsoil products. There's a reason they have never been approved for certificated full scale air cooled aircraft engines and stress testing with our smaller air cooled engines has noted similar results. The stuff seems to work ok for light duty use or where cooling is not an issue but when the engines start running hot or at peak, or lean of peak cht levels, look out.
So that's the answer as far as I'm in the mood to go with it. Buy what you want and mix the stuff just as thin as you think you can get away with. Personally I won't go leaner than 70 or 80-1 with any oil I use and some of them are manufacturer spec'ed to be usable at 100-1.
On a side note, I was looking at an engine that has been using Opti-1 at their ratio of roughly 114-1. The pistons, rings, and cylinders are now junk in that engine, especially after one cylinder "grenaded". Before the cylinder parted company with the engine there was a lot of evidence that the oil was not doing the required job. There were other contributing factors, but the oil and it's lean ratio didn't help any.
OK folks, the door's been opened and I have a few nomex flight suits so I can live with the heat that's about to commence. Pardon me if I don't reply.