Originally Posted by bucko
Grab a free PDF copy here:
As to oil changing, we have dozens of oil threads here. I would suggest a simple search on "oil", then grab a beverage of choice, sit back and enjoy the reading.
But to answer your direct question, 5K seems to be the suggested interval for changing oil if you are using semi-synthetic. If you use full synthetic, you can go longer. Some full synthetic oil manufacturers such as Mobil 1, Amsoil, and Royal Purple state 10 to 15 thousand miles. Many will say this is too long, but car manufacturers such as BMW, Mercedes, and Audi that provide free maintenance on there cars go this length; I don't see them broke down on the road because of it.
However, this will now most likely turn into yet another oil thread discussion.
Read the PDF copy that you can download from the link above. There is the information center that will tell you the percentage of oil life left in your engine. You can safely use this as your guide to changing oil if you do not have a set guideline you want to use. Ford added a deaper oil pan for the 3.7 V6 to extend the oil change interval. Take advantage of it. Use full synthetic over semi synthetic if you want to lengthen your oil changes.
If you want to use the 5K rule, then stick with semi synthetic and save some money; changing full synthetic at 5K intervals is wasting money. Your V6 Mustang came from the factory with Ford Motorcraft semi synthetic.
Also, the Ford Motorcraft oil filter is at the top for great oil filters. Use it with all your oil changes.
Manual 10k with with semi synthetic. Like others have stated you can use the oil life monitor as that it is designed for and what your manual says also pg 330
Any adverse condition should be brought to the attention of your dealer or qualified service technician as soon as possible for the proper service advice. The owner maintenance service checks are generally not covered by warranties so you may be charged for labor, parts or fluids used.
Engine oil/coolant change intervals – 3.7L and 5.0L engines*
Engine coolant, initial change
Engine coolant, after initial change
As indicated by the message center: do not exceed one year or 10,000 miles (16,000 km) 6 years or 100,000 miles (160,000 km) (whichever comes first)
Every 3 years or 50,000 miles (80,000 km)
*Shelby GT500 owners: Refer to the Shelby GT500 supplement Check every month
Engine oil level
This was an exert on the write up in the 3.7 on v6muscle performance
2011 Ford Mustang Engine Deep Sump Oil Pan
The Duratec 3.7 V-6 uses a deep-sump oil pan that helps provide 10,000-mile oil-change intervals.
Each hardened tappet has a very slight crown in the surface, about 15 microns from side to side, to work better against the surface and metallurgy of the drilled-out hollow camshaft’s lobes.
Inside, the new engine uses piston-cooling oil jets mounted in the die-cast aluminum block that allows a higher compression ratio and a greater amount of spark advance for power production. With check valves in place, the cooling jets work only when the engine is hot and highly stressed. And, speaking of oil, you won’t have to reach for the left-front-mounted oil filter or drain the sump of the die-cast deep-sump aluminum oil pan of its 5W-20 oil for 10,000 miles, a 33-percent improvement over the usual 7,500-mile interval. This is an advantage brought about by continuous analysis of driving cycles (Ford says almost all of its engines will be 10,000-milers by 2012).