Millers CRO Running In Oil

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  • Regular price £25.99

Competition running in oil for test bed running. Advanced formulation of high quality solvent refined mineral oils fortified with special low volatility components and appropriate additive treatment.
Millers Oils CRO 10w-40 Engine Oil is also known as:

Millers Oil CRO 10w-40 Engine Oil
Millers Oil CRO 10w40 Engine Oil
Millers Running in oil
Millers Competition Running in oil


CRO 10w40 is formulated to meet the needs of the professional engine builder.
Maximises power output by optimising bedding in process.
CRO 10w40 provides full protection of highly stressed components whilst allowing optimum bedding in process for piston rings and bore.
CRO 10w40 additive technology enables full load runs for short bursts.
The viscometrics selected ensure that even though the additive system performance is strong the pistons can achieve satisfactory boundary lubrication for bedding purposes.

Suitable for 5 hours test bed running or 500mls/800km on road.
Optimum oil temperature 85-115oC.
Very low leak down [4%] after controlled test bed running.