Originally Posted by RST MAD GRANT
The correct oil is 5w 30 as recommended by my ford dealer when i had mine as it's the correct oil for the i4 engine mate, cheers, Grant.
Originally Posted by Sheldy
Semi synthetic 5w 30 is the one to use for the RS2K
I would have to agree with these guys, I have 5w 30 in mine, quiet as a mouse and only 57k miles