Mobil 1 fully synthetic, multi-grade oils only.
Mobil 1 15w-50
M1 fs 0w40 has been working well for me. But this oil does lose some of its viscosity after a couple track days.
I buy mobile1 high mileage 20k mile oil and change it every year (less than 5k miles per year on my G coupe)
Mobil1 0W-30 full synthetic. Just did my first 1000-mile oil change a couple hundred miles ago. Been using Mobil1 0W-40 on my 2011 WRX for 220k miles, tracked, autocrossed, and daily driver duty after 160k miles when I had a head gasket failure and I rebuilt the engine.
I have run 0w20 in my 2013 Mazda 3 skyactiv for 244,000 miles. It doesn't burn or leak any oil between changes. I change the oil and filters every 5-6,000 miles.
If it says 5W-30 then the Hella synthetic should be fine. Except you can do all the other checks yourself. If they will use your parts that is ideal, get a Mazda filter and something like Pennzoil Ultra Platinum, Castrol or Mobil1 synthetic if you can get that.
I personally use Mobil1 exclusively with 5-30 regularly and sometimes go a bit heavier in the summer or if I'm planning on operating in 'Severe Service' conditions
MOBIL 1 every 5k miles. Not the worst or the best oill
And that mobil 1 stuff is yess ,, ass. I learned the hard way. Its like water tbh.
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