 The second upgrade came in 1987, with the arrival of the powerful F16 and some cosmetic changes.The F16 truck had a new six-cylinder, straight-in-line engine with four valves per cylinder and a high-placed camshaft.It was widely used for hauling large train weights, such as timber trucks in Scandinavia (a market hitherto dominated by Scania AB trucks powered by the Scania V8 engine, and Cummins-powered Sisu trucks in Finland).