To the German refineries for 8 years
For most of engine oil, it's rare to have good enough lubricating properties, high temperature stability and enhance engine power all rolled into one.
If a lubricants laboratory is less experiences and state-of-the-art technology, it's hard to make/produce this kind of polyolester base lubricants for car racing.
5W-60&5W-50 MB-229.52 (11-18-2015)
Both are based on same formularion just different viscosity that can influence feeling from customer.