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Story summary
- Costco limits members to two 5-quart jugs of Kirkland motor oil weekly.
- Kirkland Signature full-synthetic oil costs $58 for ten quarts, up from $30 in April.
- Crude oil trades around $100 per barrel, raising refinery profits from gasoline and diesel.
- Global oil stocks have dwindled amid the Strait of Hormuz closure.
- The closure blocks about 20 million barrels daily, similar to 1973 supply shocks.