Check this link for your car's recommended gasoline octane rating.
http://www.9195.info/9195/9195/home.do
I am wondering why for the same vehicle model and brand, they are recommending RON of 95 in the Philippines, while at KSA, they only use RON 91 !!! A good example is honda accord 2003-2007 model.
Is this just a marketing strategy to make the consumer believe that by using RON 95, they have a better engine. I think the best gauge for which fuel RON
is applicable would be the compression ratio of the particular engine.