Engine oil VALVOLINE or OEM Mazda

Just changed oil today (same oil as above) at 104,728 miles. Purrs like a kitten.

Valvoline Synpower 5W40 I've been running this (VW 502.00 approved) in our '07 Audi 2.0TSI for over 100K mlies, 10K oil changes, and no issues.

Valvoline SynPower Full Synthetic 5W-40, VW502 approved. I use it in our '07 A4 (over 100K miles) and plan to use it in our '16 GSW.

5W-30 Valvoline SynPower (full synthetic) and Mahle filter since I picked this car up at 89k in '11. Just cleared 175k last week.

I think what helped as much is the valvoline oil. Valvoline really agrees with my motor. Not sure why I have trouble with some of the other blends, but it's really quiet with the ashland add-pack.

Valvoline VR1 non synthetic. It is one of the ZDDP oils. Reasonably priced and the Z seems to like it.

[Valvoline SynPower](http://www.valvoline.com/products/brands/synpower/full-synthetic-motor-oil/5) is what I have run since I purchased my 2012 Subaru Legacy.

They should be using 0W20 full synthetic oil (not synblend crap). Its not going to hurt running the 5W20 in it instead but next time mention it at write up. Mazda claims benefits such as better cold start protection and better efficiency among other things.

Anyway, when I had my Passat 1.8T and sludge issues were the big fad, my oil of choice was Valvoline Synpower 5w40. It met 502 and was not a synthetic blend but rather a real synthetic.

I use valvoline because it's common and it does the job. My auto mechanics instructor also recommended it because he said most of the engines he'd taken apart that had run valvoline looked pretty crud free.