Thread: Which engine oil should I choose: 5W30 or 5W40?
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Old Feb 10, 2025 | 06:39 PM
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dedwards0323
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Default Re: Which engine oil should I choose: 5W30 or 5W40?
Originally Posted by ZERACER
Just curious, why mix grades?
No special reason. Usually happens when one or the other isn't available in both gallon & quart containers when I buy oil.
 
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