Hi there,
I was wondering what octane fuel I should use in my 06 Yamaha FZ6. The owners manual says regular or 87 octane fuel. I was noticing that the compression ratio is 12:2:1 so would a higher octane fuel help the performance any? I live in CA USA, octanes are 87, 89, 91. Also does anyone recommend a certain brand of fuel? I usually go with Chevron.