I have just rebuilt my engine, how do I run it in?

Vintage cars/bikes, ie. pre-WW2, had very primitive oil filtration systems and used non-detergent oils, such as our Millerol range. The Millerol range contains anti-wear and anti-corrosion additives, but does not contain detergents which can attack yellow metals.  A lower viscosity oil would be needed in the winter, such as Millerol 30 and a higher viscosity…

Both types begin with crude oil.  Mineral oil is obtained directly from the refining process, whereas synthetic oils are subjected to chemical processing which alters and improves its chemical structure. Synthetic oils therefore have better performance than mineral oils at higher and lower temperatures, but are inherently more expensive. Millers Oils produce many different mineral,…