Mixing 91+100 to get 93 in California

[Braun]

I could have sworn the recommended fuel octane was 91 for the ITS. Where did you see it is 93? Either way, minimal difference.

 

[bvanlieu]

I doubt seriously there is a 93 map in the car given how much 91 is out there in key states . I am always curious for non top-tier places at this point, who actually blends the fuel...seems to me its coming from the same places. No diferent then places offering 4 octane ratings....they only have 87 and 93 at the station we rely on the blending being correct, how would we know if buying 89 or 91

I'd run 93 over the 91 if price was the same for a bit more safety if it was me, and not bother with ethanol free unless you were dealing with carbs (which I do in my motorcycle and small engines that sit from time to time).

 

[Frenzal]

I could have sworn the recommended fuel octane was 91 for the ITS. Where did you see it is 93? Either way, minimal difference.

It is written in the manual.

 

[scooter]

It is written on the filler door.

 

[SilverRocket]

Those worried about ethanol, I wouldn't sweat it too much. I used to avoid it like the plague myself but not with the Integra.

Reasons to genuinely not use it:

1) Pre-ethanol in fuel vehicles. They used components not equipped to handle ethanol in the fuel system. Pretty much anything in the past decade or two expects it so the fuel lines from tank to combustion can handle it.

2) Long duration in tank. As others have said, ethanol accumulates water. If you're not completely emptying the fuel tank in a month or less, it can gain excessive amounts of water which can cause corrosion.

3) Equal price for non ethanol fuel. I would still put 93 w/ethanol over 91 without however again as pointed out early, the power density of gasoline is higher than ethanol so all other things equal, you'd squeeze out 5-10% more fuel efficiency which over time adds up.

 

[ISaltMySaltedButter]

Thanks again for all the responses! Appreciate the info