u/NachoDog1000

At an Exxon station in upstate New York the pump had a long yellow sticker and it said "heavy" in black letters. I didn't think anything of it, and the pumps had the usual options, so I pumped 87 unleaded like usual. A few hours later and I could tell my car was having trouble shifting gears, which could be a transmission issue.

It's a 2013 Jetta with 140,000 miles so maybe it's just time for transmission issues, but I'm wondering if "heavy" gasoline is something and I made a mistake, and I'm having no luck googling "heavy gasoline."