Since its launch OIL SPY has been developed for a number of industries, not just for cars but aircraft and of course plant with diesel engines in which it works admirably. Naturally there are many diesel cars, trucks and 4WD vehicles as well, and we are including the above chart as an example of how the oil test will look as it is a bit different to the petrol result. OIL SPY has a number of tasks to perform. Read more