What octane fuel is everyone running?

[Amc0825]

Is everyone running 89 octane or higher? Marinas in my area do not have anything higher than 87.

Sent from my SM-G955U using Tapatalk

[RC_Hinojosa]

Is everyone running 89 octane or higher? Marinas in my area do not have anything higher than 87.

Sent from my SM-G955U using Tapatalk

89 octane is the required fuel for the Raptor 400 & 440, 93 octane for the 575

[Amc0825]

Ya I seen that in the manual. My dealership said 87 was acceptable as long as it was ethanol free. I'm not sure what to think about that.

Sent from my SM-G955U using Tapatalk

[MLA]

My dealership said 87 was acceptable as long as it was ethanol free.

Sadly, misleading. Octane and ethanol have no correlation and should be two different conversation. You need to run the recommended oct or the first higher grade available. E-free is great, but you still need to follow rule #1.

[Broke Pilot]

Yep, ethanol is like octane. That’s why all the drag racers are moving to E85 tunes.
Technically 87 with E would be more acceptable than 89.

[zabooda]

Ran my boat for 18 years on 87 octane E10 and no problems. At 5gph, nothing but the cheapest gas.

[Prospersigman]

I run into the same problem in my area...my home base lake is 87 octane only. We go to Broken Bow in Oklahoma 5-6 times per year they have 87 octane only. I usually have to put the boat on the trailer and take it to the gas station to get 93. The last time I filled up with 93 and ran in it down to half tank and then topped off the tank with 1/2 tank of marina gas which was 87. Hopefully the 87 1/2 tank + the 93 1/2 tank = 90 octane The boat ran fine surfing for the last 2 days and has every since then, but I have only put 87 in it that one time.

Not an issue with PCM...just saying.

[Amc0825]

I don't mind paying for the better fuel, just do not have access to it without taking the boat out of the slip.

Sent from my SM-G955U using Tapatalk

[sivs1]

loaded question. My first boat had the Volvo V6 and Out drive, said 87 in the manual. Ran 87 once and boat would diesel every time I turned it off. Ran 91 or better and it was fine. Have ran 91 or better ever since.

I am currently having an issue with my 13 SA with the LS3 motor, gas breaks down over time. I'm getting a bunch of mis-fire codes which all could be related to lower octane gas due to it breaking down.

[KnoxMojo]

E10 89 from the gas station. 5 gallon cans to fill on the lift. Most all newer high compression engines are going to the cooler burning octanes.