I change oil the first time after 600-800 miles, use Mobil 1 oil filter, Mobil 1 SAE 5w-30 Synthetic oil. Since I drive less than 7,000 miles a year, I change the oil and filter every 6 months in the Hummer and Chevrolet Avalanche. Cost about seventy dollors a year for each vehicle as I do my own work. Cheap insurance!
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