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TheG family ofMazda engines is a family of largeinline-fourpiston engines that was commercialized from 1989 to 2014. The series started at 2.6 L for theMazda B-Series truck from 1988. Prior to that, a 2.6 LMitsubishi engine had been used.

The 2.6 L MazdaG54B was actually aMitsubishi engine. It displaces 2.6 L (2,555 cc) and was used in theB2600 pickup from 1986 to 1988, until Mazda developed their own suitable engine.

Mazda replaced the G54B with its own 2.6 LG6 engine which displaces 2.6 L (2,606 cc). Bore and stroke are 92 mm × 98 mm (3.62 in × 3.86 in).^[1] The G6 was produced until 1993 and made 121 hp (90 kW), 149 lb⋅ft (202 N⋅m) for North American models. The G6E which replaced it was used in other markets around the world.

Compression Ratio: 8.4

Valve train: 12V SOHC

Applications:

• 1989–1993Mazda B2600i
• 1998–2006Mazda B2600
• 1989–1996Mazda MPV
• 2007-2014Mazda BT-50

The 2.5 LG5 was an evolution of the G6. It produces 102 hp (76 kW; 103 PS) at 4000 rpm.

Applications:

• 1995Mazda B2500
• 1996-1999Mazda MPV

The GY is not at all related to the Mazda G-series four-cylinder engines and is listed in this article strictly by engine code association. GY is the Mazda engine code for a 2.5 L (2,494 cc)Ford Duratec V6 engine which, due to an OEM deal with Ford, was built by Mazda in Japan for limited use in the 1999-2001 Mazda MPV. This DuratecV6 engine was in turn based on the originalMazda KL 2.5 L (2,495 cc) from 1991. By the late 1990s (during the Mazda/Ford partnership) Ford executives had ordered Mazda to cease development of V6 engines and instead focus on a new range of four-cylinder engines for both companies' benefit, which would become the MZR/Duratec lineup of inline-four engines. The order to discontinue their own V6 development included theMazda K engine, leaving Mazda the only option of employing later Ford V6s, which were considerably cheaper to manufacture.

Applications:

• 1999-2001Mazda MPV (second generation)

• Mazda engines

• Mazda engines
• Straight-four engines

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