Two base oils b. 350-550degreesC, viscosity grades VG-32 and -46, collected from a com. installation, were vacuum-distilled to collect 50-deg fractions, esp. 450-500 and 500-550degreesC in 57.6% yield, and each was dewaxed and washed with resp. 400% and 100% (fraction basis) of (6:4 w/w) MEK-toluene. Acid no., Conradson C residue, and viscosity at 40degreesC were detd. before and after oxidation tests; dynamic (Ravenfield) and structural viscosity (-15degreesC) were detd. for the two fractions (to make motor, gear, machine oils, etc.), and also Brookfield viscosity (-30, -18degreesC) and demulsifying properties at 54degreesC (to make engine oils). A (30:70 w/w) 450-500degreesC fraction-SN 400 oil was a good all-season 20W/40 engine oil.