Started to maintain my vehicle outside the casa and just found out that there are counterfeit oils being sold in the market. Question is, how to know if they are counterfeit or not? Bought Castrol Edge 5w-40 Fully Synthetic for my Toyota Fortuner and quite worried if the 7 liters that I bought are not the real deal. Bought 1gal for 2850 and additional 3 liters for 2175. Nasa presyo din ba iyon malalaman if pirated or not?