I was looking at the 2003 Ford Explorer Owner Guide and it shows : That you don't have to use synthetic or synthetic blend engine oil Just use ( 5W-20 ) engine oil in the 4.6 liter V8 that meets Ford specification ( WSS-M2C153-H ) certified for gasoline engines
I was looking at the 2011 Ford Focus owners manual ( with the 2.0 liter four cylinder gasoline engine ) It shows that you don't have to use synthetic or semi-synthetic engine oil but you can if you want to The engine oil is ( 5W-20 ) certified for gasoline engines , as long as the oil meets Ford specification ( WSS-M2C930-A ) like the Motorcraft brand does
According to the 2006 Ford Focus Owner Guide ( for North America ) 5W-20 " certified for gasoline engines " Meeting Ford specification WSS-M2C930-A * use of synthetic or synthetic blend is not mandatory *
Castrol GTX (conventional motor oil) in all weights meetsford specification WSS-M2C930-A // Castrol GTX High Mileage (premium synthetic blend) exceeds it and meetsWSS-M2C945-A // Castrol Edge With Syntec Power Technology (full synthetic motor oil) meets and exceeds all Ford WSS requirements.Most name brand motor oils, (valvoline, pennzoil, amsoil, royal purple, kendall, quaker state, motorcraft) meet the Ford minimum requirement of WSS-M2C930-A. Most but not all... Ford engineers these engines for a living, I would think they know best. Please consider this as you make your choice in motor oil. If it wasn't important it wouldn't be there.
No , not according to the 2009 Ford F-150 Owner Guide Just a SAE 5W-20 oil " Certified For Gasoline Engines " meeting Ford specification ( WSS-M2C930-A )
I was looking at the 2003 Lincoln LS Owner Guide and it shows ( 5W-20 , certified for gasoline engines ) Motorcraft or equivalent oil meeting Ford specification WSS-M2C153-H The use of synthetic blend or synthetic is not mandatory , the engine oil just needs to meet the above shown specification
You can mix part synthetic oil with full synthetic oil.
Among Motorcraft oils, it would be the synthetic or synthetic blend 5W20 Among other oils, most synthetic blends and synthetics meeting 5W20 and 0W20 will meet it
Semi synthetic or synthetic blend is a combination of synthetic and conventional oil. Full synthetic oil is just that 100% synthetic oil.
Oil that comes out of the ground is not synthetic but is called crude oil. Synthetic oil is man made with synthetic compounds. They are both oil.
The 2006 F-150 owners manual shows ( SAE 5 W - 20 ) You can use synthetic or synthetic blend if you wish as long as it has the API certification mark ( certified for gasoline engines ) and meets Ford specification WSS - M2C930 - A ( for the 5 W - 20 engine oil )
Synthetic oil manufacturers.