One of my daughters just got a 2011 Ford Fiesta SES which has the 1.6 L Duratec Ti-VCT Engine. It is in very good physical and mechanical condition. It has about 135K miles on it. The previous owner has maintenance records showing religious oil changes every 4K miles.

According to the owner's manual, "use Motorcraft SAE 5W-20 or an equivalent SAE 5W-20 oil meeting Ford specification WSS-M2C930-A."

For those with knowledge and experience with this particular engine, what do you think about running a 5W-30 (full synthetic) instead? I'm thinking Liqui Moly SPECIAL TEC AA SAE 5W-30.

That would allow me to stock a single oil for use in both of my daughters' vehicles, the other one being a 2012 Dodge Journey Crew AWD with the 3.6 L Pentastar engine.

 

It will probably be fine as others have also switched without any problems..If you switch, use any name brand synthetic and forget the liquid moly. I don't see any gain with it.
Myself, I use what is recommended ( WSS-M2C930-A) and put 5W-20 in my Ford.

 

Good routine service is more than oil changes. It is a good start , but there are other recommended services that should be performed. They are listed in the owner's manual and should be performed to keep a vehicle in good running , dependable condition. Good idea to check if they were done as required.

 

I like the Liqui Moly oils and have a source through which I don't pay any more for them than any other name brand synthetic.