Hello Everyone Just had a quick question? I presently use Castrol GTX in both of my 4x4 Nissan's. I change the oil and filter every 3 months or 3000 miles (WCF)and of course use a Nissan oil filter because of the anti-drainback valve. Would I be wiser to use the Quakerstate 10w30 4x4 oil instead? Thanks for your opinions.