Realtime help, misfire on cylinder 7 P0307 CEL code. Sitting in parking lot with rough idle, not sure if I should continue driving or not.

[LTSR]

Thanks so much for sharing this, probably just saved quite a few of us some heartache, packing HEET from now on.

agreed. Directly from the Heet website: "HEET® brand products do not expire. Unopened bottles of the HEET® brand and ISO-HEET® brand have an indefinite shelf life provided the foil safety seal has not been broken"

 

[CharlieS]

Google says the active ingredient in HEET depends on the specific product variant:Regular HEET (Yellow Bottle): Methanol (Methyl alcohol).ISO-HEET (Red Bottle): Isopropyl alcohol (Isopropanol). Why not just use alcohol?