2013 SUBARU LEGACY Electronic Stability Control Esc Problems

THE CAR INTERMITTENTLY LOSES POWER WHEN ACCELERATING FROM A STOPPED POSITION. MOST OFTEN HAPPENS WHEN I AM TURNING LEFT. SUBARU SAYS THERE ARE NO COMPUTER CODES IN THE CHECK ENGINE HISTORY. CAUSE UNKNOWN BUT SPECULATION ADVANCED ABOUT NEURAL NETWORK LEARNING OF THE COMPUTER (SEEMS WORST AFTER RECENT ENGINE REBUILD UNTIL CAR WAS DRIVEN FOR A COUPLE OF DAYS WHERE FREQUENCY OF POWER LOSS DIMINISHED BUT NOT GO AWAY). ALSO PROPOSED: 87 OCTANE GAS-SHOULD USE 92, IF NOT 97 ONLY FROM OIL COMPANY STATIONS, NOT FRED MEYER OR COSTCO EVEN THOUGH CAR IS RATED TO ACCEPT 87 OCTANE GAS. OTHER HYPOTHESES: FULL GAS TANK VS 1/2 OR LESS , FUEL STARVATION CAUSES POWER DROP (NOTE: ENGINE DOESN'T FULLY DIE & CAN BE COAXED BACK TO LIFE BY PUMPING THE ACCELERATOR), ELECTRONIC IGNITION SYSTEM PERHAPS THE CULPRIT. THIS PROBLEM IS DANGEROUS BECAUSE OF THE RANDOM & SUDDEN (WITHOUT WARNING) LOSS OF POWER...