I've got oil in my coolant, only discovered when the coolant warning light came on last week. Engine wasn't over heating and the engine oil doesn't look milky but the garage is saying they have tested and there is no compressing in the crank case.

 

I've described the symptoms to my bosses friend who owns a used car garage and he is question the garages assessment says it sounds more like the oil filter.

 

Anyone offer any advice?

Obviously I mean oil cooler (its not a good day)