I just run castrol edge on mine. No issues.
as a small engine mechanic at my shop we use the Briggs and Stratton 5w 30 for everything because all we’re fixing is snowblowers but for my personal machines I either use valvoline or amsoil
I myself use Castrol Edge (in 0W20) for my GJ. But I add a bottle of Lubro Moly MoS2, for that added molybdenum (mimics OEM moly infused Mazda 0W20).
Back when I dailly drove my 05 I went 10k fuel and oil. Donaldson filters and Valvoline premium blue oil
Been running Euro blend Castrol a few years and happy with it. Engine is getting close to 200k, modified, driven aggressively. I'm sticking with works for me.
been using Castrol edge 5w-30 for the past 5 years My WRX engine still feels responsive but i know 5-40w is good overhead for high temps
But the Castrol Syn was good too.
I've used Castrol GTX in my E30 for a decade now.
E39 S62 (M5) engine - used both castrol 10W60 and Liqui Moly 10W60.
Just updating! I used to put Castrol Magnatec 5w40 on that Golf, and the engine just improved from day one. Much smoother and with greater response to throttle, and the engine start got like 2 seconds faster, almost instantaneous.
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