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
Had my oil tested and it was recommended for 3500. I went with 3k as I do a lot of miles and use mobil 1 so my cost is relatively low.
Mobil1 every 6k like my owner’s manual says. Mine is stock. Blackstone says my oil would be able to go longer if I wanted.
2016 stock WRX here. 6k OCI's using Subaru filters and Mobil 1 5w-30 EP oil backed up by oil analysis. 90k miles presently.
I do in my BMW. Oil is cheap compared to a re and re on a diesel no longer sold in country.
After some digging through some bimmer forums i saw people say viscosity is less of a factor than ensuring it's LL compatible. So the closest visosity i found in store was 5w-30 and i chose mobil 1 euro spec that was Ll-01 compatible.
I put Mobil1 high mileage full synthetic 5w-30 in both my car and my wife’s. The same gets put in the snowblower and lawn mower. It’s been that way for years and they both cut the grass and throw the snow from -30F to 100F weather just fine.
I use mobile 1, 0-20w in my 5.3 GMC. 3k miles every change w filter. In the colder months it looks brand new coming out. Little bit darker maybe. My most recent change with the past month being 85+ I noticed it finally being very dark and red.
And that mobil 1 stuff is yess ,, ass. I learned the hard way. Its like water tbh.
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