Flip a coin, your engine will not care.
I am at the point that my oil choice is based on lowest price API certified oil. Synthetic preferred.
Mobil, Valvoline, Castrol, Pennzoil/Quaker State, Chevron/Havoline, Shell/Rotella, Warren (Supertech/Amazon), makes no difference to me.
Only exception would be if it required a specific cert (like BMW or VW ), but I don't own any of those vehicles.
I am at the point that my oil choice is based on lowest price API certified oil. Synthetic preferred.
Mobil, Valvoline, Castrol, Pennzoil/Quaker State, Chevron/Havoline, Shell/Rotella, Warren (Supertech/Amazon), makes no difference to me.
Only exception would be if it required a specific cert (like BMW or VW ), but I don't own any of those vehicles.