Recommended by Yamaha to run 89 octane non ethanol fuel. My new area (moved from out of state) has lots of 87 octane non ethanol but no 89 (or 89+) that I have been able to find. All the 91 octane around here that I have seen is 10% ethanol. Anyone else have this situation where you live? I just moved to this area so I have not refueled yet. My former neighborhood had several stations that carried 89 non ethanol. Recommendations welcome! Thanks in advance.
Run the 91 and stay on top of your maintenance. Done deal.
Lake&Bay Boca
SHO
While in a perfect world, 89 ethanol free is better, 89 with ethanol is perfectly acceptable. The fuel system was designed for it, just stay at 10% never 15%.
I run 93 ethanol ( just verified at the Chevron I use ) with Yamalube ring free plus and Yamalube fuel conditioner and never had a problem. Worth the extra money per tank to me.
Last edited by BASS BUM; 07-12-2019 at 03:28 PM.
2021 Boston Whaler Montauk 170 2021 Merc 115 EXLPT EFI CT serial# 2B801590
2014 Pathfinder 2200T 2014 Yamaha 250 Sho sold 2000 Allison 2003t 2005 Merc 2.5 280 SS sold
So I just left the hydro tec guys and they made a great point. Stay clear of 89 octane because no one runs it in their cars. So mostly old gas in the tanks. Think about it, you either run 87 or 92 octane but hardly anyone runs 89. They also handed me a list of gas stations that Yamaha suggest buying your fuel at. Mostly name places like Shell, BP, Phillips 66 etc. because they mix their own fuels and have their own refineries. Staff away from places like Casey’s, Git and Go, etc as they buy older fuel from the refineries.
I thought that gas stations obtain mid grade fuel (89 octane) by mixing 87 and 91 octane fuels at the pump. There are not 3 grades of fuel in the underground tanks.
Butch Derickson
2011 Z521 w/250 hp SHO
Traverse City, Michigan
You are correct!Originally Posted by Ranger519VS
Exactly what I have always done.
Incorrect
2018 Bass Cat Caracal
Yamaha 225 SHO
I run 87 and ring free with no issues
2018 Bass Cat Caracal
Yamaha 225 SHO
Unless gas stations do things differently you sir are incorrect!
How is it known, how can it be known, what every gasoline station, or every gasoline supplier, in the US, is doing?
What is the situation when there are five grades of gasoline offered?
How is the addition of ethanol accounted for when it comes to the octane rating? Some say it is the ethanol that changes one octane grade to the next higher grade. But what if octane is not added? There is no mandate that ethanol has to be added. There is just a comment that grade XY may include up to 10% ethanol.
Confusing isn't it?
When i was in the concrete business we used to do alot of gas stations. Mostly when they would replace the tanks. They always just put two big tanks in the ground so i asked them where is the third? they said there is only 87 and 92. The 89 is mixed at the pump. I said i did not know that
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