My two cents: if you're tracking the car hard you need to change the oil every 1-3 track days anyway.
there are oils that dont drop weight in 5k. If a gt350 is being used as intended 5w50 Mc is not something id use past 1500. if your trust everything ford tells you i have a bridge i could sell you. I dont feel amsoil is needed in everything. I use pennzoil ultra in my DD sti. In a DD that isnt abused heavy or raced on a track Ultra is great. If its a car that is an excessive hp build, sees track or want longer then 5k intervals i use amsoil. If i have a car that doesnt see a lot of miles a year but want to use the oil for an entire year i use amsoil there as well. It has its place but its not needed for everything. It just depends what your doing. However MC in any situation is sub par.
If you aren't tracking it i wouldnt be using a 5w50 ever no matter what the oil is. A 5w40 or 5w30 would be great. Amsoil typically is thinner in most weights than its competitors. I highly doubt amsoil is raising pressure
Ford cannot void your warranty as long as it meets the standard. Only a jerk service manager would pull a stunt like that. I was a ford master tech unril 2013 when i switched to another manufacturer. 5w50 is a silly weight to use in any street driven car. I swear some of you really are lacking information.
My brand choice is either pennzoil ultra or amsoil/motul. What is going to be done with the car and how hard it will be driven before i just throw out some weights.
You are making an assumption that there is a problem associated with the shearing down of Motorcraft oil. You are also making an assumption that the Ford engineers who specify that we use Motorcraft in our cars either don't know what they are doing or are "cheaping out".Your oil is your engines blood essentially. Why would you buy oil that knowingly sheers down to lower weight then you purchased? You bought it for the 5w50 properties. Why would you want it to not be that when you drain it?
Its like cheaping out on your tires. Its the only contact between you and the road. It matters. When i worked at ford, i steered anyone i could away from MC oil.
You guys are obviously much more well-versed in the dynamics of oils than am I, so sorry of this is a dumb question.
Interesting that the numbers related to different mineral content look more like a random number generator than consistent figures that would lead me to a conclusion. When the numbers vary more than 100% from each other - that tells me that other variables have more to do with those numbers (owner usage comes immediately to mind) than the oil itself.
Im not making any assumptions. Youre free to speak with UnleashedBeast on svt if you like. You know what happens when you assume. Car makers are not building cars to last anymore. They want to sell you more cars. If you believe a voodoo running 5w50 is going to last 100+k on its MC using the car as ford intended on a 5k cycle, i have a bridge to sell you.
i have yet to see Mc 5w50 do better then Amsoils 5w50. Not even close or even come close to an amsoil uoa.
I will be driving the car on the street 99 percent of the time with some short bursts of throttle. I'm sure the more comfortable I get with the car ill be a little harder, but 95 percent of the time ill be cruising. My oil changes will be 3000 or less. I would bet they will be less than 1000 to 1500. My f350 diesel 2013 only has 12000 miles on it. For the truck I use the motorcraft 10- 30 diesel oil as recommended in the truck manual. Comments on that for oil would be nice too. I am a believer in the brand of oil for the product. I had CAT diesels and liked to use cat oil, Mercury oil for mercury products (boat engines) , ect.
If you are putting that litle of miles on the car, its going to be sitting a lot. So for your driving style and how much itll sit id use 5w30 or 5w40 if you prefer. Id only use amsoil in your application in the signature series.
