GMC Terrain: Fuel / Prohibited Fuels (Gasoline)

GMC Terrain 2018-2023 Owners Manual / Driving and Operating / Fuel / Prohibited Fuels (Gasoline)

Caution

Do not use fuels with any of the following conditions; doing so may damage the vehicle and void its warranty:

For vehicles that are not FlexFuel, fuel labeled greater than 15% ethanol by volume, such as mid-level ethanol blends (16–50% ethanol), E85, or FlexFuel.
Fuel with any amount of methanol, methylal, ferrocene, and aniline. These fuels can corrode metal fuel system parts or damage plastic and rubber parts.
Fuel containing metals such as methylcyclopentadienyl manganese tricarbonyl (MMT), which can damage the emissions control system and spark plugs.
Fuel with a posted octane rating of less than the recommended fuel. Using this fuel will lower fuel economy and performance, and may decrease the life of the emissions catalyst.

Recommended Fuel (LYX - 1.5L L4 Turbo Engine, LTG - 2.0L L4 Turbo Engine)

LYX - 1.5L L4 Turbo Engine Do not use any fuel labeled E85 or FlexFuel. Do not use gasoline with ethanol levels greater than 15% by volume. Use regular unleaded gasoline meeting ASTM specification D4814 with a posted octane rating of 87 or higher...

Fuels in Foreign Countries

The U.S., Canada, and Mexico post fuel octane ratings in anti-knock index (AKI). For fuel not to use in a foreign country, see Prohibited Fuels (Gasoline)...

Other information:

GMC Terrain 2018-2023 Owners Manual: Car Wash Mode

This vehicle includes a Car Wash Mode that allows the vehicle to remain in N (Neutral) for use in automatic car washes. Car Wash Mode is not to be used for vehicle towing. If the vehicle needs to be towed, see Towing the Vehicle Caution The vehicle is not designed to stay in N (Neutral) for extended periods of time...

GMC Terrain 2018-2023 Owners Manual: Trailer Towing