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What octane fuel to use?

1506 Views 8 Replies 8 Participants Last post by  Duran
I don't own a Titan, I own a 2008 Pathfinder V8. I think it's got the same engine as the Titan.

The book isn't exactly clear about what fuel I should use. They use two different measurements in the book, but the numbers are kinda close to one another so I'm not sure what to go by - I live in the US.

I *think* it says I should not use fuel under 91 octane. But does that mean I SHOULD try to use 93? Or that it's perfectly tuned for 91? Or what?

The dealership seems just as clueless as I am. (which is pretty bad..)
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You could use whatever octane you prefer. I've run 87 and I've run 93. I mostly use 93 octane because I'm advanced 2* just for piece of mind. My '05 Maxima says "premium recommended for maximum performance" so that also tells me that octane rating is for personal preference as I could run 87 and not have "maximum" performance.
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