When a diesel engine is operated on diesel oil at a high altitude, as on the Highveld, it is in most cases impossible to obtain the rated output without heavy smoke emission.
Reference:
Heim, F. 1974. Reducing smoke emission by diesel engines. http://hdl.handle.net/10204/12912 .
Heim, F. (1974). Reducing smoke emission by diesel engines Retrieved from http://hdl.handle.net/10204/12912
Heim, FO Reducing smoke emission by diesel engines. 1974. http://hdl.handle.net/10204/12912
Heim F. Reducing smoke emission by diesel engines. 1974 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/12912