Fuel mix for Echo 550EVL chain saw?

I have an Echo 550EVL chain saw, bought in 1985 which I used to use a lot. I have not used it for some time(years) and I have lost the instruction book, etc. Now, I want to use it again, but I am not sure what fuel mix I can use...Can I use no-lead 95 + 4% oil mix or do I have to use a (leaded) Super fuel(+4%oil), which is difficult to find where I live (Carcassonne, France)?

Rupert Deighton
October 2006