Kestas
Staff member
I have a 2010 Murano with 80K - new to me. I see the filler door gives a recommendation of using 91 octane gasoline. The wording makes it sound optional, which suggests the engine has a knock sensor. If I can get away with it, I don't see the point in using premium, when it costs 23% more than regular ($2.65 vs $2.13). I don't believe I'd lose 23% gas mileage, or harm the engine. It may have made sense back when when it only cost 11% more ($3.90 vs $3.50) or less. What do you think?