What’s the viscosity of 2 stroke TCW-3?

[Elkins45]

Just curious: if TCW-3 two stroke oil was rated like four stroke engine oil what rating would it have? I know before the development of dedicated two cycle oils the outboard makers just mixed straight 30 weight, so my guess would be that it’s somewhere around there, but that’s just a guess.

 

[MolaKule]

Viscosity Charts - Bob is the Oil Guy

Viscosities can be related horizontally only Viscosities based on 96 VI single grade oils. ISO are specified at 40°C AGMA are specified at 40°C SAE 75w, 80w, 85, 5w, & 10w specified at low temperature. Equivalent viscosities for 100° & 210°F are shown SAE 90 to 250 and 20 to 50 specified at...

bobistheoilguy.com

Since the viscosity at 100C can range from 6.4 cSt to 14.5 cSt the SAE Grade would range between between a 20 Grade to a 40 Grade.

 

[Elkins45]

Thank you.

 

[Snagglefoot]

Mystic TCW-3 is 6 cSt at 100 C.