I have a 05 WRX with Cobb Stage 2. I have been running ESSO gas 99% of the time and once with Shell and 711. No problem with those three and car ran great.
But tonight I filled with Petro Can (ESSO or Shell was too far). Put in $20 worth. Drove for like 20 secs, the car "jerked", then again 20 secs later, then again 20 secs later. It almost seemed like it was misfiring, but no engine light. I wasn't going fast and I wasn't on boost.
My car just roll over the 20000 KM mark. Had to Cobb tune for over 10000 KM. Never had a problem until tonight.
Anyone had that problem?
I'm going back out tonight and will see what happen.