Scott P
New member
Oils have improved greatly in recent years. Getting extended oil change intervals is not that hard. I routinely change the oil in my GP at 6 month/6,000 mile intervals. The Envoy was changed at 10,700 miles.
I've run Mobil 1, Amsoil (regular and Series 2k), German Castrol Syntec and Royal Purple in the vehicles. I also have been using Lube Control every 1,000 miles or so.
The engines are fine. I know that because I had the oil analyzed. When I changed the oil in the Envoy at 10,700 miles, oil analysis confirmed that it was fine, just near the end of its useful life. The wear metals were easily in range and the additive pack was still going. The same goes for the 6,000 mile intervals in the GP. That car gets driven harder than it should at its age (111,000 miles and counting) and it shows normal wear metals.
Changing the oil too soon is a waste of money. The "it's cheap insurance" excuse is sad and wasteful. How much less oil would we use if people didn't follow antiquated rules such as the 3,000 mile oil interval? People whine about being addicted to oil, but refuse to do anything about it because they have this baseless 3,000 mile rule in their head.
I've run Mobil 1, Amsoil (regular and Series 2k), German Castrol Syntec and Royal Purple in the vehicles. I also have been using Lube Control every 1,000 miles or so.
The engines are fine. I know that because I had the oil analyzed. When I changed the oil in the Envoy at 10,700 miles, oil analysis confirmed that it was fine, just near the end of its useful life. The wear metals were easily in range and the additive pack was still going. The same goes for the 6,000 mile intervals in the GP. That car gets driven harder than it should at its age (111,000 miles and counting) and it shows normal wear metals.
Changing the oil too soon is a waste of money. The "it's cheap insurance" excuse is sad and wasteful. How much less oil would we use if people didn't follow antiquated rules such as the 3,000 mile oil interval? People whine about being addicted to oil, but refuse to do anything about it because they have this baseless 3,000 mile rule in their head.