97 SOHC, 115,000 miles
consumption approx 1qt/1000 5W30 dino (Pennz, Valvo, etc)
(no additives, cleaners, etc used here)
Mobil 0W40: 1 qt in 3000 miles
GC: half qt in 3500 miles
(changing @ 6 months rather than miles due to many short trips - Mobil was in for summer)
Next trial is Rotella 5W40