riverrunner5891
Well-known member
I recently purchased a boat (first time owner) and need to ask your advice on fuel grades to run. The dealer told me to run Premium 97+ octane, but I have since been doing some checking and Mercury recommends 87 octane minimum. I have been told these motors are extremely sensitve to ethanol and to use the lowest ethanol content possible. I know a lot of times they use ethanol to increase the octane in gasoline, meaning the lower the octane the safer I would be (in my opinion). The motor is a 2006 Mercury 225 Pro XS Jet. Your thoughts an advice is much appreciated.