As such, its working capital requirement, and by definition, its current ratio, is higher than its peers. Although that's usually not a bad thing from a liquidity standpoint, it does mean the company ties up more cash in running its business than its peers.
If you are wondering how AutoZone and O'Reilly can run such low working capital (and current ratios below 1), recall that these figures are just a snapshot of a company's accounts. They are retailers and will receive millions in cash and credit through their stores in a few days of trading.