Hoo-bouy!I started with Mobil 1 0W-20, then they are no longer available so I switched to 5W-20. Now my local Walmart stocks both 0w-20 and 5w-20. Which is better?
You need to spend a week reading bobistheoilguy.com (BITOG), where that subject is the topic of continuing, extended, technical, and heated debate all the time.
1. Follow the vehicle manufacturer's recommendation and you cannot go wrong. For the Mazda6, that means that you run 5W-20 whether you are in Alaska or Panama, summer and winter.
Hey here in Panama, Mazda Dealer and the Mazda Manual recomend 10W-30. And my 6 is a 2.0
See BobIsTheOilGuy thread. Executive summary: yes.I was having the same concerns too because I was using Mobile 1 10W-30 and later switched to Castrol 5W-20.
I have a strange question, can you mix motor oils up? I mean since my 6s takes 6 quarts of oil, can I use 3 quarts of 5W-20 and 3 quarts of 10W-20 (same brand, full syn) in an oil change? Just curious