I'm about to change the oil in my girlfriends 1999 Cougar 2.5 V6, the manual recomends 5W30, i would rather 10W30 for the summer here in Louisiana. Will this hurt the engine in anyway? Any info appreciated.
quote:I wonder why Mobil 1's website says 0w-30 gives the best fuel economy of their 30 weight oils?
Originally posted by GeorgeCLS: If you are using Mobil 1 products, the 0W-30, 5W-30 and 10W-30 are essentially the same.. Basically 30 weight base stock that just happens to pour at 60 below zero.. One might say the only difference between the 3 Mobil 1 oils is the label that is on the bottle....
quote:Come on now.
Originally posted by GeorgeCLS: If you are using Mobil 1 products, the 0W-30, 5W-30 and 10W-30 are essentially the same.. Basically 30 weight base stock that just happens to pour at 60 below zero.. One might say the only difference between the 3 Mobil 1 oils is the label that is on the bottle....