2016 G23 w/ XR7 engine: requires 93 octane, but only 92 oct. widely available locally

[sarasetp]

Pretty much every gas station around here only carries 92 octane as the highest grade gas I can get. Would it cause issues in my XR7 engine (long or short term) if I went with 92 Octane?

[nyryan2001]

Call PCM customer service and talk to a tech service rep.

you'll be fine.

PCM probrably has the best customer service of any company under correct craft.

[DW SD]

All new engines have knock sensors (I assume XR7 is new-ish?). If the fuel grade is too poor, the knock sensor will report detonations (pre-ignition / knocking) to the computer, which will retard the timing. This will de-power, likely not noticeably, but will avoid damage. I'm confident you'll (well your engine to be more accurate will) be fine.

The dealer could likely poll the computer's diagnostic data to find knock events (usually they are recorded) if you were wanting to be extra cautious.

I wouldn't steer you this way. The onboard fault protections make for very safe engine operations even on lesser fuel grades.

Doug

[ironj32]

Everything will be fine with 92 octane. I've never had an issue.

[charlesml3]

Everything will be fine with 92 octane. I've never had an issue.

Agreed. One point of octane difference isn't going to matter.

-Charles

[chief351]

If the computer pulls timing (1-2 degrees) and spark for one point of octane you'll lose 5-10 horsepower, you won't notice enjoy!