Freshly rebuilt engine - Oil light on!

Information that I have been given from lubrication engineers that I used to work with. Fully synthetic oils do not transfer heat as well as mineral oils, so your oil temperature will be lower. This means that the oil is not cooling the engine as well as it should. In industry they do not use synthetic oils for cooling applications. eg. large transformers

This is not my opinion, but what I was told by guys that went to university to learn about oils and greases.

(They also told me not to steal the very expensive molybdenum disulphide grease from work for my CVs as it would dry out because it wouldn't be worked hard enough)

 

I think they were telling porkies to protect their stocks.

 

Ok, well dont seem to be any further ahead at this point, mmmmmm, none for , none against.......