I had a 98 Corolla that "consumed" oil also. Bought it at 30K and it would go through may a quart every 750 miles. Only thing that slowed it was going to a 15W-40 that cut the consumption in half. Car ran great and had it until 186K miles and a kid totaled it while it was parked in front of my house. Auto-RX is not going to cure the issues with these cars. Just get use to being on a schedule to top it off once a week and move on with life.