I just checked Bimmerworld and the price is $65.62 a gallon. You getting a discount we’re not aware of?1 gallon of RL 5w-30 on Amazon is $65.62. Can get it for $53.60 on bimmerworld, problem is you have to buy 3 gallons. I guess I can store the excess for next year. Anyone have any other reliable sources to check for RL?