Which tire has the highest Treadwear (UTQG) in size 225/50R18

It's time to buy new tires for my car, but I want to buy a tire that lasts longer than the original brand, OEM. Which tire has the highest Treadwear in this size 225/50R18?

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800 - Treadwear

 Continental TrueContact - UTQG: 800AB - Tire Rating: 0

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780 - Treadwear

 Cooper CS5 Grand Touring - UTQG: 780AA - Tire Rating: 0

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740 - Treadwear

 Goodyear Assurance ComforTred Touring - UTQG: 740AB - Tire Rating: 0

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600 - Treadwear

 BFGoodrich Advantage T/A Sport - UTQG: 600AA - Tire Rating: 0

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560 - Treadwear

 Nitto Motivo All-Season Ultra High Performance Tire - UTQG: 560AA - Tire Rating: 0

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540 - Treadwear

 Continental ExtremeContact DWS - UTQG: 540AA - Tire Rating: 0

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500 - Treadwear

 Nexen CP672 - UTQG: 500AA - Tire Rating: 4.57

 Cooper Zeon RS3-A - UTQG: 500AAA - Tire Rating: 0

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480 - Treadwear

 Bridgestone Ecopia EP422 - UTQG: 480AA - Tire Rating: 0

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440 - Treadwear

 Aeolus AU02 - UTQG: 440AAA - Tire Rating: 4.75

 Cooper CS3 Touring - UTQG: 440AA - Tire Rating: 0

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420 - Treadwear

 Kumho Ecsta 4X KU22 - UTQG: 420AAA - Tire Rating: 4.69

 Nexen N5000 - UTQG: 420AA - Tire Rating: 4.55

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400 - Treadwear

 Continental ContiProContact - UTQG: 400AAA - Tire Rating: 4.23

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320 - Treadwear

 Nankang AS-1 - UTQG: 320AA - Tire Rating: 4.46

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300 - Treadwear

 Yokohama S.DRIVE - UTQG: 300AAA - Tire Rating: 4.33

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280 - Treadwear

 Continental ContiSportContact 5 - UTQG: 280AAA - Tire Rating: 0

 Bridgestone Potenza RE050A - UTQG: 280AAA - Tire Rating: 3.84

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260 - Treadwear

 Pirelli P7 - UTQG: 260AAA - Tire Rating: 3.81

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180 - Treadwear

 Yokohama Advan Sport V103 - UTQG: 180AAA - Tire Rating: 4.38

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