Is the Evo equipped with a square or round fuel tank?

[MacRuby]

The Evo features a square fuel tank. The Lancer Evolution, developed and manufactured by Mitsubishi Motors, is commonly referred to as LE, Lancer Evo, or simply Evo. Each generation of the Evo is denoted by a capitalized Roman numeral. The entire series is equipped with a 2.0-liter turbocharged engine and an all-wheel-drive system. In terms of body colors, the Evo is available in six options: Emerald Black, Mystic Black, Tungsten Gray, Topaz Brown, Coral Red, and Pearl White. Regarding body dimensions, the Evo measures 4510mm in length, 1810mm in width, and 1480mm in height.

[Diego]

Just a couple days ago I helped my friend refurbish his 9th-gen EVO and specifically researched the fuel tank issue. The shape of Evo fuel tanks actually varies by generation, but most of the classic models people commonly modify feature round fuel tanks. The round design offers better fluid dynamics under the chassis, preventing excessive fuel sloshing during high-speed cornering that could affect fuel delivery - crucial for AWD performance cars. However, some early versions or special batches might use square tanks. To confirm, either crawl under the car for direct inspection or check the maintenance manual for that specific model year. Seasoned EVO enthusiasts all advise against arbitrarily modifying the tank shape, as the OEM design has been thoroughly track-proven.

[ErinRose]

Having worked on Japanese performance cars for over a decade, I've handled many eighth and ninth-generation EVOs. Most fuel tanks feature a circular design, which relates to the vehicle's positioning—round tanks distribute fuel pressure more evenly, ensuring stable fuel supply during aggressive driving. The chassis layout also offers clues: when the exhaust adopts a center layout, the fuel tank needs a rounded shape for proper fitment. However, note that overseas base models may differ, with some using square tanks to cut costs. For modifications, I recommend sticking with the OEM design. Our shop once encountered a case where switching to a square tank caused fuel starvation during high-speed cornering, triggering the warning light.

[SanGrant]

Those who drive EVOs understand that fuel tank design directly impacts the driving experience. Classic models like the 8th and 9th generations all feature round fuel tanks - a deliberate design by Mitsubishi engineers considering weight distribution and fuel pump pressure. Round tanks also offer maintenance advantages; last time I replaced a fuel pump, it only took me half an hour. Note that some USDM versions use square tanks due to local regulations. Actually, the tank shape mainly depends on the chassis' bottom recess - EVO's pronounced curvature naturally pairs best with round fuel tanks.

[SanVivian]

When studying JDM cars, I noticed a detail: genuine factory EVO fuel tank caps have a circular label on the inside, hinting at the tank's structure. The biggest advantage of a round fuel tank is its superior pressure resistance. Given that EVOs frequently race on tracks, the circular structure distributes force more evenly during intense fuel sloshing. Although square tanks can hold slightly more fuel, Mitsubishi prioritized driving performance over an extra 2 liters of capacity. A little-known fact: all EVO fuel tanks post-2001 were equipped with anti-rollover valves, which permanently fixed the shape as circular. To verify a car's authenticity, checking the fuel tank shape is more reliable than examining the VIN plate.