Originally Posted by
liamford
i went to ford today to get new oil and filter...they gave me 5w 40 full synthetic... for my st escos.. ? this oil will be right wont it? cheers liam
They used 5w50 Fully Synth from new, 5w40 will be too thin when it gets hot so you'll have lower oil pressure (not a good thing). You may find its too thin from cold as well but it depends on the condition of your engine.
Take it back & get 10w50, not from Ford either.