"2. What is the difference between this oil and a regular PCMO you make like Pennzoil Platinum or Conventional Pennzoil?
a. Shell Rotella Gas Truck provides unsurpassed wear protection that larger, higher-torque powertrains need. It outperforms conventional motor oils in severe conditions like stop-and-go driving, sludge forming environments, extensive idling, heavy hauling and towing, rugged terrain and extreme hot and cold temperatures. This is a full synthetic product and is formulated differently than Pennzoil Platinum. The chemical composition of the products is quite different. Both Pennzoil Platinum and Shell Rotella Gas Truck are full synthetic motor oils with a modern package of additives meeting the latest API SN PLUS requirements. Shell Rotella Gas Truck is specifically formulated with higher levels of antioxidant to protect the larger vehicle engine. This enables the oil to cope with the more stressful and hotter operating conditions, often encountered by truck and SUV owners. However, both products you referenced provide a very strong level of protection for passenger car engines."
I'm sure this is a very good oil. Shell doesn't make a bad oil.