A coulpe (probably more!!!) of the lads from the regiment are currently running their motors on OMD 90. The guys from the fitter section have advised them not to because it might damage thier cars. someone years ago (when it was OMD80) once told me not to put it in my own car because of all the cleaning addatives.?????????? This got me thinking "why would we put a mineral oil into a tank engine that gets super hot, and why would we put sh1t oil into Rolls Royce engines!" Obviously its an OMD oil, But is it purely mineral or is it semi synthetic? Does anyone know exactly what is in this oil? (grade / addatives or even the manufacturer etc).