I've been driving my car for more than a year now. When I bought the car, the original owner who used it for a little over 5 months before selling to me said the oil he uses was Total. I continued with that. With zero knowledge of oil types.
Recently I started seeing gurus here mentioning 20w... Bla bla bla. Then I started feeling stupid. I changed the engine 3 months ago and I continued with Total.
My question is, how do I know the best oil for my car. Is there any where I can check this information, I have the vehicle's instruction manual but the booklet was written in French and I don't speak French.
It's an Honda accord 2006 Europe.

Honda recommends using 4 quarts of their synthetic blend 5w-20 Motor oil.