2003 Dodge Durango 5.9...94,500 miles. Concerned about oil consumption. 1.5 quarts every 3,000 miles or so. Using Pennzoil Platinum 10w-30, yearly OCI. Should I try a high mileage 10w-30 or go straight to a 5w-40. No smoke, leaks, etc. Interested in combating oil consumption. Any advice on this motor.
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