This is just crazy. Years and years ago, SOPUS made Pennzoil Ultra Platinum a 15k mile long-drain oil. Then, they stopped that claim, and went back to manufactures intervals only. They said they believed these were the best, and were just sticking by what was said in the manual for a vehicle OCI.
Now, another SOPUS synthetic other than their top-ranked PUP is making extended-drain claims, when QS has never been a long-drain oil!
….what happened to SOPUS sticking by manufacturers intervals; and if they ARE NOT doing that, why is a ‘second-tier’ oil becoming top of the heap?!?!?
Now, another SOPUS synthetic other than their top-ranked PUP is making extended-drain claims, when QS has never been a long-drain oil!
….what happened to SOPUS sticking by manufacturers intervals; and if they ARE NOT doing that, why is a ‘second-tier’ oil becoming top of the heap?!?!?