I have noticed online that the PUP 5w30 ($36.xx) is $12 more than 5w20 ($24.xx). Is this always the case? If so, is the 5w30 a better quality base, or does it just not sell enough?
LINK: https://www.walmart.com/search/?query=pennzoil ultra platinum 5w30&typeahead=pennzoil ultra
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LINK: https://www.walmart.com/search/?query=pennzoil ultra platinum 5w30&typeahead=pennzoil ultra
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