Happened to me the other day in wal mart as well, even the normal yellow bottle sold out.

Sorry to hear that man but I'm feeling good that most likely the red heet will help you! Winter is rough on vehicles and especially ours

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards