My car calls for 5W20 but i figured its ok to use 5W30? Its summer here so i thought it would benefit using the 30 instead of 20. Its a 2001 Ford Taurus 3.0 v6 with 127K miles and i put the Castrol High Mileage Syn Blend 5W30 in it. what do you guys think is better to use?
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