The ESP oils are an excellent value and choice for moderate/typica OEM drains. Porsche's cleanliness standard is quite a bit tougher than the API and these are stay in grade oils. Mobil 1 ESP and Valvoline European XL-III etc while meeting the mid SAPS and minimum HTHS values don't appear to contain any polar materials based on VOA. It means the 'ring' cleanliness standards required by Porsche/Audi/VW/BMW/MB/DEXOS2/ACEA C3 are obtained in LIMITING deposits, but they have little to no natural solvency. This is likely why HPL/Red Line/Torco/Amsoil Euro cost more due, to the more polar base oils they use.