MK7AlltrackBlack
New member
- Location
- Edmond, Oklahoma
- Car(s)
- 2017 Alltrack
I have a 2017 Golf Alltrack with a IS38 swap, unitronic stage2 plus, and stage 2 Unitronic TCU tunes....with this tune it calls for 93 oct. I live in OK and the last gas station chain around here that had 93 oct no ethanol (which my car loved) stopped carrying it... There is one other place I know of that has 93 gas with ethanol. When I tried it, my car started misfiring under hard acceleration and the epc light came on. Maybe it was a bad batch of gas there and had nothing to do with the ethanol but I havent been back since. Since then locally I have been using 91 no ethanol with octane booster and it seems to be alright most of the time, but honestly I am hesitant to really drive aggressively with it so I dont know for sure... Recently took a long road trip over the holidays (900 miles to GA one way) and was able to get 93 w/ethanol once I got further east. But I ran into the problem again...car misfired when I had to suddenly hard accelerate on the Interstate, car misfired, epc light came on and had to pull it over to stop and restart engine, ran ok after, just had to take it easy. Coils, plugs, and turbo were all brand new about 7 months ago when installed and car ran great for about 3-4 months up until I started putting in the different gas...
Ok, so here's my question, barring any issues with the plugs, and coils which I need to rule out as maybe contributing to the issue....can I mix 91 oct and say 2-3 gallons of E85 (if I can get it) to get to 93 and run it in my engine without causing anymore problems? Will it hurt it if the mixture ends of making it higher then 93 octane (say for some reason like 95 or 96 oct)?
Ok, so here's my question, barring any issues with the plugs, and coils which I need to rule out as maybe contributing to the issue....can I mix 91 oct and say 2-3 gallons of E85 (if I can get it) to get to 93 and run it in my engine without causing anymore problems? Will it hurt it if the mixture ends of making it higher then 93 octane (say for some reason like 95 or 96 oct)?