SOPUS is Shell, Quaker State and Pennzoil
http://www.google.com/search?hl=en&lr=&q=sopus
The synthetics use Shell's GrpIII (XVHI?) base oil?
wouldn't hold a candle...
http://www.google.com/search?hl=en&lr=&q=sopus
The synthetics use Shell's GrpIII (XVHI?) base oil?
wouldn't hold a candle...