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
LINK: https://www.amazon.com/s?k=pennzoil+ultra+platinum+5w-20&ref=nb_sb_noss_1
LINK: https://www.walmart.com/search/?query=pennzoil ultra platinum 5w30&typeahead=pennzoil ultra
LINK: https://www.amazon.com/s?k=pennzoil+ultra+platinum+5w-20&ref=nb_sb_noss_1