98 Octane petrol in new Lean Burn 4 strokes for long trips

I was thinking of running BP Ultimate for my next big trips (Montes & Kimberley) to see if the higher octane fuel gives better fuel economy giving me a longer range.

I have a 2015 Suzuki 200hp Lean Burn, which from my understanding has knock sensors allowing the motor to run leaner. I was thinking that these motors will probably adjust better for the higher octane fuel and give better efficiency.

Even say 5% better would be great, would mean 1 or 2 jerry cans less I need to carry for the same range. Financially it wouldn't be worth it but for these trips having a longer range for the same weight/load would be a massive advantage.

A lot of people get an extra 30-50km per tank in their car running BP Ultimate why wouldn't an outboard be the same?

Any experience with this?

squidvicious1's picture

Posts: 596

Date Joined: 22/07/10

 Haines Group in qld are the

Wed, 2017-08-02 09:55

 Haines Group in qld are the Suzuki dealers for oz.

look up their website, they have  a contact area.



Posts: 11

Date Joined: 06/10/13

 Ive got a 2000 Yamaha 4

Wed, 2017-08-02 16:35

 Ive got a 2000 Yamaha 4 stroke and pondered this some years ago. I found that liters per nautical mile and nautical mile per $ in my outboard, 95 fuel was best. If you've got an accurate fuel meter you can work it out pretty easily. 

morgs's picture

Posts: 105

Date Joined: 25/10/11

Millard Marine

Thu, 2017-08-03 13:46

Got told premium is a no go on my Suzi 60. never asked the question though.

Coastrunner's picture

Posts: 190

Date Joined: 25/10/14

98 in my Suzi 115

Thu, 2017-08-03 17:41

 I'd like to know what the logic is behind not using 98 other than cost.

sea-kem's picture

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Date Joined: 30/11/09

 Yep Would love to hear it

Thu, 2017-08-03 19:30

 Yep Would love to hear it because that's all I use.


Love the West!

VaSSagO's picture

Posts: 99

Date Joined: 09/12/09

I contacted Haines Group,

Thu, 2017-08-03 14:40

I contacted Haines Group, they advised they recommend using 95 Octane or higher fuel.

The wouldn't confirm if using 98 Octane would give better fuel efficiency.

Might give it a go for the next big trip and see how it goes, can't hurt.

Paj man's picture

Posts: 328

Date Joined: 16/09/12

I was also told

Fri, 2017-08-04 09:17

Not to use anything other than 91 in my 2015 lean burn. Again, didn't ask why though.

I have used 95 in Coral because that was all which was available but didn't pick any difference in performance.


aka Nick

Posts: 689

Date Joined: 09/10/06

 Theres no mention in the

Sat, 2017-08-05 20:29

 Theres no mention in the suzi manual not to use 98 octane. All it says is to use a minimum 91 octanne.

We use 98 in our df90a. Havent noticed any better economy from 91 as it uses bugger all anyway.