Originally Posted by okaythen
only motorcraft and castrol oil? so does that mean if you use other brands it will affect the fuel economy and durability? I think if it's a good oil any engine oil will do right? as long as it's good it won't affect fuel economy and engine durability? like mobile 1, quaker state, valvoline etc....
we can also use conventional oil right? manual says full syn and blend.
also oild change for full synthetic is 6k to 7500, conventional is 3k, how about blend?
I bought 4 different oils today and i will send samples from each oil change and then see which one is the best for my car ...i have motor craft , castrol, valvoline, mobil1 and Pennzoil platinum and ultra lined up for Blackstone test ..i will try royal purple and Amsoil after these oils .
I want to see which oil do the best protection at 10.000 miles oil changes