When i picked up the car around 3 weeks ago it was at 7L, then a few days later it went up to 8L for a day or two. Had the car for around 3 weeks or so....is this "normal" drop in oil levels? Bare in mind that I have not been driving like a grandma....mostly always in M mode P500 Sport too. Tried to call AutoZone and Pepboys...no go for Castrol TWS 10w-60. I assume this is a dealer purchase only?