Originally Posted by dutd33
Sorry, I forgot to ask one question: Is there a big difference between the Motorcraft Synthetic Blend versus let's say conventional 5W-20 oil?
Under normal driving conditions, I'd say the biggest difference is how often you change the oil. I can't quote any fancy scientific research but synthetics won't break down as fast as conventional. My recommendation is to change the oil sooner with conventional. Conventional @ 3,000, Blend @ 5,000 and Full Synthetic @ 7,500 to 10,000.
If you live in an area of extremes (high heat, dirt, cold), synthetics in my opinion will protect better and require fewer changes. I'm sure others will offer their opinions soon.