High Quality Content by WIKIPEDIA articles! This B18 was a straight-4 automobile engine produced by Volvo Cars from 1961 through 1968. The five-bearing, cam-in-block engine, had OHV overhead valves operated by pushrods. The B18 is quite different in design from its predecessor, the three-bearing B16.These engines are often quoted as very durable. The world's highest mileage car, a 1966 Volvo P1800, has run all its more than 4,000,000 km (2,700,000 miles) on its original B18 engine The B18 displaced 1.8 L (1778 cc/108 in³) OHV engine and was used in the Volvo PV544, 120 (Amazon), P1800 and 140 series. The B18 could also be found in the L-3314 and the Bandvagn 202 military vehicles. It was fitted to many Volvo Penta sterndrive marine propulsion systems.