Engine oil Mobil or OEM Mazda

Mobil 1 V-Twin 20W-50 all day long on my sporty for both engine oil and primary/transmission. Mobil 1 has better wear protection than the HD stuff.

Mobil 1. If you can find them, and if you can buy them original, no regret yo.

The newer 2.0TSI engines used a low friction oil scraper ring so they seem to use more oil than earlier engines. If not abused, then should be ok if you maintain the oil level.

But then we replaced it with a SkyActiv Mazda3 that used 0w20 and proceeded to have a good long history with that motor that had 0 oil consumption in 125K miles; I did all of the oil changes myself and it was always 4.5qts in/4.5qts out every 5k miles.

Mobil 1 . When my engines run smooth, makes it worthwhile. Any newly changed oil is better than any old oil. But Mobil 1 > Rest of ‘em.

I used to use German Castrol 0w30, then Belgian Castrol 0w40, now I use Mobil 1 Euro 0w40 in most applications. Intervals of 5000 miles Every engine I've had ran great under this regime.

Mobil 1 0w20 ESP. Advance Auto and some Walmarts have it.

I used to get my 0-40 Mobil at WalMart for my Audi, because they were the cheapest.

My changes have generally been religious at 5k and that didn’t save my GTI from losing compression in cyl3 at 37k untuned miles it suffered 15% leakdown vs the other 3. That car got M1 0w-40, tried and true stuff, so you just never know.

I used to use M1 0-40 in my VR6 Corrado, but the valve, chains and engine noise went way up, especially at a cold start