.OV SIGNATURE SERIES HELPS KEEP ENGINES CLEANER !-3/),3IGNATURE3ERIESISFORTIlEDWITHAHEAVYTREATMENTOFDETERGENT additives, delivering 28 percent more acid-neutralizing power than Mobil 1* and helping engines stay cleaner, longer.LL LL"ASEDUPONINDEPENDENTTESTINGOF-...