F FastSUV Joined Jan 18, 2009 Messages 1,081 Location oklahoma Jun 23, 2009 #1 or do they generally contain some GP-IV or GP-III base? Let's say name-brands like Castrol or Pennzoil.
or do they generally contain some GP-IV or GP-III base? Let's say name-brands like Castrol or Pennzoil.
Johnny Joined May 27, 2002 Messages 14,013 Location Retired | Wausau, WI Jun 23, 2009 #2 Pennzoil YB 5W-20 is made with a Group II+ base stock.
Pablo Joined Oct 28, 2002 Messages 59,380 Location Everson WA - Pacific NW USA Jun 23, 2009 #3 I believe the Johnny. I think you can generally tell the base oil by the cost. Even group III will cost more.
I believe the Johnny. I think you can generally tell the base oil by the cost. Even group III will cost more.