Well, for anyone interested, the 20W-50 stateside appears to be a no go. I can get the 10W-40 very reasonably from my Local Napa. I will be ordering this oil, Liqui Moly MoS2 Leichthauf 10W-40, in the fall, and plan to buy seven litres. Five for the change, one for top off, and one for a VOA. I was going to use a Napa kit, are they any good?