How many of you use only 91 octane fuel?
Looking in the manual I find this on page 1-3
The 5.0 engine was designed to run on unleaded
fuel having an octane rating of 87 for improved
performance use 91 octane.
87 octane top tier gas seems a better choice than just
any old 91 octane
KIA ads say use 91 octane in the V-8, but manual says it is designed to run on 87 octane, better performance with 91 octane
That is only the V-8 . the V-6 says use 87 octane
I have tried both and don't see any difference, except in my wallet
I have always found that. My wife's mini cooper calls for 91+ octane and its leased so when she fills it up ( rarely) she uses hight test when I fill it up I use 87 .She has not noticed any different although her driviong is very little . Owned 18 months 3500 miles on Odometer