I have a couple of 5-qt jugs of Mobil 1 Truck/SUV 5W30 sitting in my garage for quite some time (at least a year and half now), and have been thinking to use them up in my 96 LX for the next oil changes. I know these are supposed to be good oil, but my LX has always been been running the Castrol GTX 5W30 for years and the last thing I want is for it to develop some oil leak due to switching of the synthetic oil. What do you guys think, shall I try the Mobil 1 Truck/SUV at all?