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  1. Regular Service / Maintenance
    At 166,000 miles, it is now using more than 1 qt per 1000 miles. Used to go 6000 without using any. Changed every 6000 with M1 5w20 and K&N filter. The oil use seems to have started at about 130,000, and is steadily getting worse. Jeep claims PCV valve has been replaced every 30,000 as part of...
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