Should you always adhere to your manufacturer's recommended octane rating?

[valacirca]

^ ...and you also said "stick to what your manufacturer says" and my manufacturer says:

"Your vehicle is designed to use only unleaded fuel having an octane rating of RON 91 / AKI 87 or higher."

Kaya ko po kina-clarify.

[lowslowbenz]

(FYI: I currently drive a 1.4 AT EX Kia Rio Sedan. This thread is just an offshoot of a discussion sa Kia Rio thread.)

Ang recommended octane rating kasi for Gamma engines - like the ones used by Kia and Hyundai - is RON 95.

Who told you this? Your handbook says 91 RON or higher, di ba? So use 95 RON (or 93 RON).

[valacirca]

^ Got the RON 95 recommended octane rating from the Kia Rio thread here.

Saw the RON 91 recommended octane rating from the manual.

In any case, like I said, I'll be using XCS from now on. But I was just curious about the discrepancy.

[niky]

The big problem with following manufacturer's recommendations here is that "RON" doesn't always mean the same thing from station to station.

Moreso now, that most of our fuels are blended with E10, and given the station to station variability and lack of quality control.