Midget 1380cc engine oil

[TGJR]

I have just bought a Midget with a stage 2 1380cc engine and would like to know what grade of engine oil it should be run on.

I know as a rule of thumb older cars tend to be best suited to a mineral oil but with this engine that was built 12K miles ago is a semi-synthetic or synthetic oil better?

Thanks.

[TGJR]

Thanks for the suggestions and it concurs with my thoughts. The vendor said he thought it had semi-synthetic oil in but I will refresh with a good mineral oil.

Great fun cars though!