What engine oil to use in 04 Cobra?

[Stalker27]

:shrug:No Royal Purple users...........:??:

Royal Purple 5w20 here :dancenana:

 

[Stalker27]

I was running Royal Purple 5w-20 til making the switch to the Castrol Syntec 0w-30.

My car seems to run smoother all around, but it's only been a day at this point. We'll see how it does for the next 4k-5k

Only reason why it runs smoother is cause its new "fresh" oil. If you would have changed your oil again with RP it would have ran just as smooth as the Castrol

My shop told me to use RP 5w20 & NOTHING else so thats what i'm gonna run with

 

[EvanStang]

no issues?

 

[*P*Grass]

Ive been using Amsoil 5w-20 since Ive had the car. Even when I drain the old oil it still looks good.

^

 

[lgonz051]

mobil 1 5w-30 full synthetic here.