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HI gang,

A newbie rider and picking up my 2005 800 efi today. Curious, what octane level gas do you all run?

Mechanic mentioned use highest octane available.

Thanks for any input.

Musky....
 

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Have had 400 2-stroke, old (98) 500 carb, and now have two 500 EFI's. Always run 87 pump gas with stablizer. Friend has a 2010 800 EFI in his 6x6 and also runs 87 with no problems. Extra octane is wasted on a low compression motor. You might think it runs better but it won't unless you increase the compression. Sad but true.
 

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Yea the cheapest is the way I go!
 

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I should have asked that question 10 fill ups ago and saved some dough
lol
 

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anything higher then 87 octane is not going to boost your performance at all on a lower compression engine such as these machines. at best you will just be throwing money away, at worst you will actually cause a knock....different octane fuels burn at different speeds and your ATV cant compesate to advance or retard the timing (knock sensor in cars)
 
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