I'm an American living in Ghana, West Africa driving a Cleveland-made Ford engine (1.6l ecoboost). 

Determining the right fuel to use has been interesting as their octanes here don't use the same .. scale? RON vs .. whatever. 

I was running fuel from one station that was supposedly a 91~ octane but found out from the mechanic here that it's actually crap - just advertising. He recommended I switch to Total, Shell or Allied. Only Total actually states their ethanol content and they actually boast a 20% mixture of ethanol to gas. Apparently back in the States there is a limitation of no more than 10%. The other companies do not list their mixtures and despite my attempts to contact them, they do not respond. 

Is there a simple way or cheap kit that I can order in from the US that can let me test the ethanol content of a given fuel? Also, on the european system what octane should I be going for?