Car in question is 97 Saturn with 110,000 miles, run most of the time on dino 5W30 various brands. Oil consumption which seems typical for these cars trended upwards over time to approx 1000 miles / quart. No external leaks. After discovering BITOG, I have dumped in Mobil 1 0W40 and have run 2000 miles with essentially zero oil consumption. Comments?