I had a look on their website. Seem to indicate they are designed for air cooled 2 strokes
"OPTIMA RACING TWO STROKE OIL (SYNTHETIC)
Optima Racing two stroke oil has been designed to give maximum protection to air cooled two stroke engines working under high speed and severe loading conditions where a JASO FC specification lubricant is required. Recommended for use in competition motorcycles and a variety of two stroke applications such as mopeds, motor scooters and chainsaws. It is suitable for pre mix and oil injection systems. Product Specification - API TD, TC -W3"
from here
http://www.exol-lubricants.com/find_...?CategoryID=17
That is the only one on their site with TC-W3, not sure why there is power range in the advert either, generally they are either ok for 2 stroke outboards or not?? The specific outboard oil isnt mentioned on their website
might be worth an email to them