Engine oil Castrol or AMSOIL

I use Amsoil, all 3 holes.

The Engine oil is proven, the claim about the gearbox oil helping to find neutral easier was true for me, and the primary fluid does just that.

I have amsoil 20/50 in the crank, amsoil primary, and amsoil tranny. It’s the bees knees

My rotary expert in north Texas recommended that I use 10-30 conventional oil. I personally prefer Castrol GTX

Any synthetic - I like the Amsoil.

I use Castrol Synthetic 10w-30 on mine.

It’s thicker oil, so I feel like it gives the engine better protection. With 272k miles on it, I figured why not.

I’ve been running Castrol GTX 10w30 conventional in my 9000 Aero. Brought it to a Saab specialist and he recommended it. Need to have the valve seals redone and the oil is thick enough that it doesn’t get past the seals and no smoke. No issues running it. I change it every 3 months regardless of how far I’ve driven.

Good results with Castrol Edge Euro full synthetic. No issues. 138,000 miles, no oil consumption or smoke.

Castrol is great option if it is not fake, also make sure to change oil every 10000km (6200 miles). Those engines are bulletproof, should cause no issues

Castrol Power 1 isn't a bad oil, but I'd say not the best either. I have only used LiquiMoly as an alternative, so far and I rate is better than the Castrol but it did cost almost 2x as much too.

personally, I think Amsoil AFL is junk. They ruined a stout oil when they reformulated it to mimick 505.01.