661 Oil Test 32:1 vs 40:1 vs 50:1 ?

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It certainly won't damage your equipment, I just chose to use dedicated pre mix oils. The thinner fluids can protect less or contribute to deposits due to excessive use of solvents.
Thinner fluids defined as lower viscosities?
 
I you want to run Motul, why not just use 800T?
I've been using 800 off-road with good success but was considering a lower viscosity, like "chainsaw" labeled oils, to see if I get better performance. Motul 710 has a lower viscosity like Stihl and Yamalube.
 
Thinner fluids defined as lower viscosities?
Yes.
I've not ran 710, but actually am using some 800 on a limited basis. I am not overly impressed with it thus far. It's far from bad oil though. I just think it's more suited to a saw that's used to mill.
Yamalube 2R is a dedicated premix oil,.although it's not overly thick. I like it and it's worked well for me for a long time. It also has a very long track record in a variety of sports. It's never a bad choice.
 
710 worked fine. It's not as thick but it left a great coating behind.
Dave, not to beat on you because you make a valuable contribution to this site. However, residual oil is heavily influenced by ratio and how the engine was running when shut down. Let a engine idle for a bit before it's shut down and it will be full of oil. Cut brush all day and the same thing will happen.
 
Dave, not to beat on you because you make a valuable contribution to this site. However, residual oil is heavily influenced by ratio and how the engine was running when shut down. Let a engine idle for a bit before it's shut down and it will be full of oil. Cut brush all day and the same thing will happen.
True. When I was running it I tried it in a ported 660. If I remember right I was in lots of big wood that time from storms. Running a 42" bar on it.
 
I think that suit would get dismissed pretty quick when a Stihl or Husky owners manual was admitted as evidence..
I certainly hope you get the opportunity to plead your case.
It could get interesting when they ( the oil co ) produce their testing evidence of running their particular oil in those particular manufacturers saws verses a blanket statement from a manufacturer who couldn't care less what you were being sued for, you would need really deep pockets to subpoena the saw manufacturers testing proof against that individual particular oil if they had any testing done which showed contrary results from the oil manufacturers results
 
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