Ok, I'm not trying to start an out of control thread, however I am interested in how often and what products you use for oil changes. On all my vehicles I change oil at least as often as recommended by the manufacturer and use the recommended products or better. That is where the debate should get interesting. On my '20 Polaris 850, I use the Polaris recommended oil and filter and change once a year or more often depending on hours of operation. In my trucks, I use Mobil full synthetic until I get them over 100K then I'll use a blend or high mileage oil--Valvoline or Mobil or NAPA. Since I'm in NM Montana I use 0W20 to 5W30.
Would like to hear what you're using.