The one Valvoline oil that really impressed me was Valvoline MaxLife. My previous car ran great with that motor oil. I am serious the engine seemed smoother. The reason I tried the oil was because it supposedly had a seal conditioner that could stop seal leaks. I had a small seal leak. In that respect the Valvoline did not impress because it did nothing for the seal leak. Auto-RX seemed to solve the seal leak.
But the Valvoline MaxLife is more expensive then Chevron or Halvoline and those motor oils are rated highly in VOAs and UOAs at bobistheoilguy.com. So why not just use Chevron or Halvoline? And you can get some of the benefits of the Valvoline MaxLife oil by adding small amounts of Valvoline MaxLife oil supplement to your motor oil.
But the Valvoline MaxLife is more expensive then Chevron or Halvoline and those motor oils are rated highly in VOAs and UOAs at bobistheoilguy.com. So why not just use Chevron or Halvoline? And you can get some of the benefits of the Valvoline MaxLife oil by adding small amounts of Valvoline MaxLife oil supplement to your motor oil.