4.5 L is the Ideal for Mazda 6 2.5 non turbo, I'm from the same country as you. I'm using fuchs titan 5w30 for two years and I recommend you do the same, I noticed quieter engine.
Owner reviews for engine oil
Motul Ako from shell long ride mas tahimik sa makina for me and mas maganda performance
Super love yung long ride sa XSR700 ko, swabe ng feel sa clutch and shifter.
ZIC - Dito ako nag stay, ang tahimik sa makina, both matic and manual. Malamig din sa makina.
i am using motul for my PCX and change oil ko is every 3k, then major change oil every 6k
yung ifull drain ung langis hehe
Just use the Motul. The Xotic is expensive and subpar. Also avoid any in-house engine oil, trust motorcycle companies for good motorcycles, trust oil companies for good oil. I switched to Motul and got slightly increased mileage, and a smoother engine. Also the heating was reduced DRAMATICALLY
I use pennzoil ultra platinum 0w-20 and a purolator BOSS filter
Been reading user anecdotes about R&P for a while now, and it's like 98% positivity among those who reported oil consumption before using R&P and seeing substantial improvement after.
My Miata isn't currently burning an oil at all, but I put R&P in it and I intend to change it every 3k because it makes me sleep well.
Personally I use 5w-30 because it's the cheapest. I've used 0w-20 and 0w-30 in the car also. Can't tell what is in the car at any given time as it runs exactly the same regardless so just use the cheapest that's still up to the relevant specifications.
I used Pennzoil before but felt real cheap quality and used to get darker before the competitors. I moved to Mobil 1 or Castrol GTX and felt the difference in smoothness.
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