Using Mobil 0W20 ... read this...!!!
 

From another site... so I did not do this but confirmed 0W20 is no longer available from Mobil.


Hey I just wanted to let you all know I called Mobile 1 today and spoke to them about the difference in 0w-20 and 5w-20 Mobile 1 synthetic oil since 0w-20 says on the bottle it is recommended for ford vehicles that would otherwise use 5w-20

Well, they told me that 5w-20 IS NOT just 0w-20 packaged in a different bottle as many have stated on this forum. Actually 0w-20 is being discontinued because many consumers were having trouble at the dealerships for not using 5w-20. He told me that 5w-20 would replace 0w-20 and it is actually a little bit thicker viscosity at start up than 0w-20, but would supply all the same benefits gains from 0w-20. He said those individuals using 0w-20 could change to the new 5w-20 without any difficulties.


I think this is some important information for fellow mach 1 owners that are currently using either 0w-20 or 5w-20, so i just thought i'd pass the word along.

I read that also. I changed the oil out from stock and went with Castrol 5w20 non synthetic ever since.
Now I am going to use Royal Purple 5w20 fully synthetic come spring time. Thanks for passing this along.