Hello everyone.
I know that here we can find a lot of questions about oil. And I am using Mazda oil every time when I change. I know some people are using Castrol or some other brands. But did someone put Valvoline oil and if it is what are results. Is it better, what effects has it and so on?

Thanks to everyone.

 

I mainly use Valvoline oil in all of my vehicles.......and have never had a problem with it. I would imagine that Mazda oil gets expensive if you are buying it from the dealership!

 

It is expensive. But I never used Valvoline before. Most of people buying Castrol.

 

There is no "OUTSTANDING" any current or past in the last 3 decades documented via empirical testing and accumulated data from independent but controlled testing facilities with no influence from oil marketing companies or refineries etc., that OEM or top brand oil marketed have any negative effects on use as long as the basic service of ol and filter schedule is adhere to set by the auto manufacture.! FACT! The choice of motor oil is always a conflict, debate, and at times argued on forums and thus it makes it for many so confusing to owners, but it really is simple. Use the recommended viscosity and use your GO-TO *top brand oil that you have used and trusted for decades.
Unless there ever comes oil analysis or the auto manufacture stating USE ONLY" then K.I.S.S (keep it simple stupid) method and use what you like.
*some oil are sold under a generic branded oil as an example SIGNATURE oil sold be Safeway (Safeway - Wikipedia ) but if you read the bottle and like many of the like you will see that it refined and or bottled from a national or worldwide distribution company such as another example Chevron ,Shell, (see below for the less known by most) etc. and affiliates oil refining bottling and distribution companies.
The top ten oil refineries in the world include12:

1. Jamnagar Refinery in India
2. Paraguana Refinery Complex in Venezuela
3. SK Energy Ulsan Refinery in South Korea
4. Ruwais Refinery in United Arab Emirates
5. Yanbu Refinery in Saudi Arabia
6. Baytown Refinery in United States
7. SK Energy Incheon Refinery in South Korea
8. Port Arthur Refinery in United States

I personally use Castrol , ( **I recommend Castrol 1st ) Valvoline, Mobil 1, Shell, Cheron, mainly these are because I get distributor, wholesale or bulk quantity pricing.
(**I started to use Castrol in my Mazda and have several oil analyses from using it. based on the results I prefer it but not because the other showed any less or negative oil analysis report)
ASE

 

Thank you Callisto