Which gas to use in a 240 efi

[seb brunet]

Hy guys I heard so many people's said different thing about the gas should I use premium regular or 89

 

[Dr Honda]

That engine will run just fine on regular. BUT... with high heat and humidity... and the alcohol they generally put in fuel now... it's safer to run 89.

There no reason to run premium fuel, as it burns slower... and can actually cause the piston crowns to overheat, and doesn't produce any more power. (so it's just wasted $$$)