Manufacturer: Mazda

Production years: 1973-2003

Cylinder block material: Aluminum

Fuel system: Carburetor / Fuel injection

Configuration: Rotary engine

Number of cylinders: Two rotors

Displacement, cc: 1,308 cc (79.81 cu in)

Type of internal combustion engine: Wankel engine, naturally aspirated and turbocharged versions

Compression Ratio: 9.2:1 – 1974-1978 NA engine;
9.4:1 – 1984-1988 NA engine;
9.7:1 – 1989-1992 NA engine;
8.5:1 – 13B-T 1986-1988;
9.0:1 – 13B-T 1989-1991;
9.0:1 – 13B-REW and 13B-RE.

Power, hp: 135-280 hp (101-209kW)

Torque, lb ft: 130-231 lb-ft (180-314 Nm)

Engine weight: 330 lbs (150 kg) – 13B;
337 lbs (153 kg) – 13B

Firing order

Engine oil weight: 20W-50;
20W-50/10W-30 – 13B turbo rotary engine;
10w-30/synthetic 5w-40 – 13B twin turbo rotary engine.

Engine oil capacity, liter: 4.4 – 13B and 13B-T;
3.3/3.5 – 13B twin turbo rotary engine.

Oil change interval, mile: 7500 miles (12,000)/7.5 months

Applications: Mazda RX-7, Mazda Cosmo, Mazda RX-4, RX-5, Mazda Luce