yeah spend the money. I was having issues and I dont know if it was fuel related or not. I had a full tank 10 gallons 92, 4 gallons 87, after driving real hard, the car didnt seem right. Parked it, its was misfiring on all cyclinders, then it wouldnt idle. Anyway my 3rd cyclinder injector went out so that was my fix. What the gas had to do with it breaking I dont know, I just know feed your car the good stuff. Oh yeah I was running AP Stage two at the time. I'm dreading going down to california, thier gas sucks.