So, Im helping my grandfather decide on an oil for his car. He wont extend his OCI past 5k so we both agreed a dino would be the best bang for your buck and it came down to Pennzoil YB and havoline DS, Now P YB is 13.50 for 5qts and Havoline DS is close to $11 for 5 qts (wally world prices) Which would you choose and why besides the cost factor?