Engine oil Eneos or IDEMITSU

I've had pretty great results from Eneos Sustina in my 2017 3.

Use a good quality synthetic engine oil; I use Eneos.

You don't need to add any more additives to modern day oils. You said you will be using Mazda 0W-20 oil? This is one of the best 0W-20 oils on the market. It is made by Idemitsu for Mazda. It has very high Viscosity Index of 221. Most 0W-20 oils are around 170. This means it is one of the lightest 0W-20 at start up. This is what you want in the winter.

I've owned this car for a year and stuck alot of money into it and love it but have to part cause i just ordered a RHD rx-7 from japan so i need to make room in the garage and i have to part with my VW its sad but i hope i find a good owner. INFO: 46,000 miles ENEOS oil is good for 22,000 miles they say but i still changed it every 5,000 miles. i also used it in the transmission and i felt a difference just from the oil and will use it now in every car i own.