Wifey uses it on the Maxlife and Synpower I buy at Wal-Mart. $3-3.50 off a $17 jug of oil is nothing to sneeze at!
To quote a friend, "Synthetics, man."
'85 GMC C3500, 454, 132K
'82 Mercedes 300CD, OM617 turbo, 173K (totaled 2018, in rehab)
'85 Mercedes 300TD, OM617 turbo, 217K (wife's)
'67 Suburban, 350, 331K