Recent content by douglas9x

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    Pennzoil SAE vs Castrol GTX/ 20 W 50

    Why such a big difference in price between Pennzoil and Castrol 20 W 50? Is Castrol that inferior compared to Pennzoil? TIA Pennzoil SAE 5 quart 20W-50 Motor Oil $34.76 Castrol 03095 GTX 20W-50 Motor Oil, 5 Quart $16.97...
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    2002 GMC/Low Yearly mileage/OCI

    2002 GMC/1500/5.3 drive only about 800 to 2000 miles per year mostly short trips under 3 miles with 49K miles. Use dino 10w30 Penzoil. Owner manual recommends yearly oil/filter change without regard to mileage. Have followed since truck was purchased in 2002....Can i extend the change interval...
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