Engine oil OEM Toyota or AMSOIL

I use AMSOIL signature series 0W-30 but the Mobil-1 suggested by others is totally fine — AMSOIL is awesome but is expensive.

I ran Amsoil in my 2002 7.3 for years and it worked well for me.

Valvoline is ok, but that specific oil does not have the rating required for your vehicle. AMSOIL has by far better additives to clean/restore the engine. If you are currently using AMSOIL, then continue using it.

My 2014 had 226K changed it at toyota every 10K no issues

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

Any synthetic - I like the Amsoil.

I’m using Amsoil Signature oil.

Suggested I change oil from Castrol Syntec to maybe Royal Purple or Amsoil.

im actually running that oil right now... I hate it tbh. 3,100 on the oil and it has allowed excess engine noise since day one, SUPER harsh cold starts, and now its burning through faster than the catrol I ran when I first got the car. a WHOLE QUART over 750 miles. the oil is thinner than piss going in, and it just doesnt stand up to what my engine can put out like Shell Rotella T6 has been doing...