Basicly, im into buying a BMW e91 320d, the recomandation is an oil 5w30 or 5w40 with ACEA C3 LL04 aproval, like Castrol Edge 5w40 ACEA C3 LL04. The problem is I cannot find the HTHS rating of the oil. Ive basicly googled that a good HTHS rating for a 5w40 oil would be around 3.7 and upwards, in...