Hello,

Which is the best motor oil for Fiesta RS Turbo?

15w50 or 10w40 syntetic?

Thank you for help and sorry for my bad english...

 

I'd say the thinner stuff but some people run the 15w40 to help quieten the engine etc.

 

Ok, thank you for information!

 

i always run mine on mobil one motorsport and never had any issues

 

Ford, Fully Synthetic Formula-S 5w/40.

Gareth

 

yeah i always run it on 5 40 w fully synthetic ford oil

 

Yup, it's what it's meant to have, and mine has run on it successfully for many, many years now

Gareth

 

yeah its 5 40 fully synthetic i know coz i asked ford while i was there, it clings to the turbo and all the parts which is of course what u want mind u its about 15quid more per tub but hey u goin cheap or proper?