There may be good news on the horizon for those of you using Mobil 1 15w50. I know the plant manager of the local Exxon-Mobil packaging plant here and emailed him about the future availability of this oil at Walmart, which has been providing it at very attractive prices until recently when they pulled it from inventory. He sent me an email today saying that Walmart was "planning to re-launch" this product in July or early August in both the 5-qt. and 1-qt. sizes. I guess customer reaction has been sufficient to make them rethink pulling it from their shelves. "Planning to" doesn't sound like it's etched in stone, but I think this still may be good news for many of you.
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Checked Wal-Mart again today, still NO 15w50 -even in quarts. I couldn't find anyone to answer if they were going to get it again.
I saw my Exxon-Mobil contact the other day and he said "It's coming." He is someone within EM who would know, but doesn't work for Walmart or know their schedule.