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

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im burning some motul 800 at 32:1 in my weedeater and it doesn't mind the thick oils. i noticed the motul is cleaning the exhaust port quite well.
im just getting rid of the mix.
 
2R is not an injector oil for starters..


don't see anything specific about injector oil on 2S ...infact it says all purpose!

2S - says "all purpose 2 stroke oil"

https://www.yamahapartsandaccessori...ngine-oil?b=Engine+Oils&d=30|30&dealernumber=

This technologically advanced semi-synthetic base stock and additive 2-stroke engine oil provides all-season performance and greatly reduces visible smoke. Low deposits and reduced carbon and varnish deposit means longer engine life and greater performance over time. It provides exceptional lubrication in all temperatures, and a special additive maintains flow and prevents “gelling” in sub-zero conditions.

2R - says "competition 2 stroke oil"

https://www.yamahapartsandaccessori...ngine-oil?b=Engine+Oils&d=30|30&dealernumber=

A high-performance 2 stroke blend developed to stand up to high temperatures, rigorous demands and stress of competition engines. Special base stocks protect against wear and breakdown, low carbon deposits on pistons, rings and exhaust ports, reduces friction that allows for maximum horsepower.
 
don't see anything specific about injector oil on 2S ...infact it says all purpose!

2S - says "all purpose 2 stroke oil"

https://www.yamahapartsandaccessori...ngine-oil?b=Engine+Oils&d=30|30&dealernumber=

This technologically advanced semi-synthetic base stock and additive 2-stroke engine oil provides all-season performance and greatly reduces visible smoke. Low deposits and reduced carbon and varnish deposit means longer engine life and greater performance over time. It provides exceptional lubrication in all temperatures, and a special additive maintains flow and prevents “gelling” in sub-zero conditions.

2R - says "competition 2 stroke oil"

https://www.yamahapartsandaccessori...ngine-oil?b=Engine+Oils&d=30|30&dealernumber=

A high-performance 2 stroke blend developed to stand up to high temperatures, rigorous demands and stress of competition engines. Special base stocks protect against wear and breakdown, low carbon deposits on pistons, rings and exhaust ports, reduces friction that allows for maximum horsepower.
2s is an injector oil.
 

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