What type of fuel should the Mercedes-Benz G-Class use?
3 Answers
The "Big G" refers to the Mercedes-Benz G-Class, which should use gasoline with an octane rating of 95 or higher. Generally, the recommended fuel grade is indicated on the back of the fuel tank cap and in the vehicle's manual. Below is some relevant information about the Mercedes-Benz G-Class: 1. Powertrain: The Mercedes-Benz G-Class is equipped with a 4.0-liter twin-turbocharged V8 engine, producing 421 horsepower and a maximum torque of 610 Nm. This engine reaches its maximum power at 5,250 rpm and its maximum torque between 2,000 and 4,750 rpm. It features direct fuel injection technology and uses an aluminum alloy cylinder head and block. 2. Suspension: The front suspension of the Mercedes-Benz G-Class uses a double-wishbone independent suspension, while the rear suspension employs a solid axle non-independent suspension. Off-road vehicles like this typically use solid axle suspensions due to their simple structure, better reliability, and durability. The solid axle suspension also enhances the vehicle's off-road performance.
I've been driving a G-Class for three years, and fueling up requires careful attention. The official manual clearly states that 95 octane or higher unleaded gasoline must be used, and I've never dared to use lower-grade fuel. Some car enthusiasts say it's okay to use 92 occasionally, but I really don't recommend risking engine knocking. Especially during long-distance trips or off-roading, when the engine is under heavy load, 95 octane fuel provides better anti-knock performance. The older naturally aspirated G500 could indeed use 92, but the new G-Class models are all turbocharged with higher compression ratios, making fuel quality requirements much stricter. It's best to choose reputable chain gas stations to ensure fuel quality. The 'Super Unleaded Only' label on the fuel cap is the most straightforward reminder for us.
As a mechanic with over a decade of experience in auto repair, I've worked on numerous G-Class engine bays. The heart of a rugged off-roader like the Mercedes-Benz G demands premium fuel. The high octane rating in 95-grade gasoline effectively prevents pre-ignition and engine knocking. Especially during summer hill climbs or consecutive overtakes, quality fuel allows the twin-turbos to perform at their peak. Once, a client used cheaper 92-octane fuel, triggering immediate check engine light warnings and causing the engine to shake like a tractor - the subsequent fuel system cleaning cost over 8,000 RMB extra. Remember that triangular 95 symbol on the fuel cap isn't decorative. In remote areas where 95 isn't available, always mix in octane booster when temporarily using 92-grade fuel.
