It was Mobil 91 octane which here in Canada is an Esso product sold thru Super Store Gas Bars. I was running a 91 tune. I have to say I am concerned with the reliability of this engine because I wasn't running a radical tune by any means. Not sure if you read the other thread, but I did not burn a hole thru the piston like I originally thought. The piston failed at the wrist pin boss and took out the rings. I don't think any of the pieces went out the top. The broken rings were still in the ring lands and any piston pieces went down into the oil pan. I didn't find anything in the sump pick up screen, just in the oil when I drained it out.
Do not try to go blaming it on the reliability of these engines because there are tons running around with hybrids and upgraded turbo’s without problems as well as tons on tunes with stock turbo’s.
You bought someones elses trashed headache sorry if that comes off harsh but I am just tired of seeing your posts trying to blame gas , trying to blame the engine.
You made a bad purchase I am sorry for you for that but just suck it up man and stop trying to look for something else to blame,