I buy the 3 5 quart bottles of Castrol Edge from Amazon. Currently $95. A chunk of change but works out to about $6.30 per quart. Was $80 when I bought it last time.
FWIW, I've bounced between the Liqimoly and Motul until the last 2 years when I started with the castrol edge 10w60 full synthetic oil. It seemed like I always used a little bit of oil between changes until I switched to the Castrol. On my last trip on the stornello, I ordered the full change kit from af1 and they sent the Castrol edge . I flogged the living daylights out of it for over 3,000 MI and didn't burn a drop. I've switched all to it at this point.
I do a 3k oil change and 6k oil with filter on my small blocks, and stick with 6K on the big blocks so this one purchase sets me up for the year.