Air-cooled Tanaka 1.2 calls for TC-W oil !!

[cruisercan]

The manual of my 1.2HP Tanaka (Sears Gamefisher) calls for 50:1 of TC-W (BIA certification) oil even though it is an air-cooled motor.
It is my understanding that air-cooled 2-cycle motors use API-TC oil (as they run hotter) and that TC-W oils are meant for water-cooled engines (as they run cooler).
Just wondering why the manual of this motor specifies a TC-W grade.
For the owners of similar motors, what are you guys running?

 

[flyingscott]

Follow the recommendation of the manufacturer.

 

[cruisercan]

I'm not arguing their recommendations, just wondering why is it different from every other air-cooled 2 cycle motor.

 

[brim_buster]

Eska 1.2hp says the same thing in their manual, Its air cooled as well. Dont use TC-W3

 

[cruisercan]

Hmm.. conflicting info.
Anyhow, I found this oil locally, it satisfies both certifications, API-TC and TW-C3. I will use it for peace of mind.
It's also convenient so that I can run the same oil in both my motors (Tanaka-> Air-Cooled, and Evinrude-> Water-cooled)
https://www.ufa.com/products/Documents/12972_2-Cycle Oil_Spec Sheet_FIN_LR.pdf