ROCK OIL GROUNDSMAN 2 STROKE SEMI SYNTHETIC 5L LAWN MOWER & STATIONARY ENGINESA high performance, semi synthetic low ash 2 stroke engine oil. Suitable for ECHO, Husqvarna, Makita, McCulloch, Oregon, Partner and Stihl equipment (where specifications are appropriate), as well as most other land based horticultural or industrial equipment utilising a two stroke engine. Features Excellent wear protection provides a longer engine life Good thermal stability and deposit control leads to cleaner engines resulting in extended spark