My '91 Tracker 1.6 with 138K miles was using about 1 to 1.5 quarts of dino juice with a 3K OCI. After I switched to Castol HM, the consumption was reduced to (and remains at) about .5 qt per fill. No change in driving habits, miles per week, etc. FWIW, I drive about 85 miles round trip per day...