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This is regarding the 2.0 turbo; the recommended fuel for the 1.5 turbo is regular grade 87 octane.
So far all that I use is Top Tier Phillips 91 octane, no ethanol or BP 93 octane, with ethanol.
I'm just a little gun shy of using 87 octane because of a potential LSPI issue with these direct injected turbo engines: Just not willing to gamble with an engine failure if better fuel can potentially avoid it.
Remember, LSPI is an issue among various manufacturers using small displacement, direct injected, boosted induction engines, and the cause hasn't been completely understood or resolved yet.
I also use a Dexos1, Gen2, certified oil: Mobil1 Extended Performance 5W-30 in my 2019, 2.0 Equinox, to also aid in preventing the LSPI phenomenon.
If the GM powertrain engineers recommend premium fuel, I'm going with that recommendation.
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