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Discussion Starter · #1 ·
I have read most of the threads here about this topic. Seems the consensus is to use factory fill Motorcraft or Amsoil. I have another suggestion to ponder. I have used MPT oil in my cars for some time including some extremely high performance engines. This stuff is big $$$ but it is IMO far ahead of your typical synthetic oils. For me the increased performance and protection is well worth the dough. The website sucks, which they concede, and they tell me will be updated shortly. Even though they have been selling it for a while, the 5W50 is not even on their site lol.
No hocus pokus stuff, it is SAE SN certified but where it really differs from others is that it is a strictly group IV and V base oil. Higher Zn and Moly, very high TBN. No group III base stocks which are basically ultra refined petroleum oil which can be called ‘synthetic’.
I have zero relationship with MPT of any kind. Get no perks, discounts or anything from them. I just think this is the best stuff out there. Here is a link to their sh*tty site. You can get the 5W50 by calling them, or from Amazon.

MPT® Thirty-K Full Synthetic High Performance Motor Oil
 

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Have seen tests that show Ampsoil to be the best synthetic on the market.
Used it in my Boss 302 & currently my 2015 Corvette.
Just MO
 

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Discussion Starter · #3 ·
Have seen tests that show Ampsoil to be the best synthetic on the market.
Used it in my Boss 302 & currently my 2015 Corvette.
Just MO
No worries. I am sure Amsoil is a great product. My intension was only to offer another alternative to the Motorcraft. Not many true full PAO/Ester base stock 5W50 options out there. The MPT is just not widely marketed so most people would have never heard of it.
 

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Amsoil meets Ford's oil spec WSS-M2C931-C, they specifically state it.
 

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Was told by dealer anything other than Motorcraft 5w50 would void the warranty if the motor blows. E85 as well. Not sure what his angle was.
That is total bull$hit. I would tell the dealer that I want to see that in writing. I seem to recall that a manufacturer can only recommend an oil to use, but they cannot require them to use it.
 

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Discussion Starter · #9 ·
That is total bull$hit. I would tell the dealer that I want to see that in writing. I seem to recall that a manufacturer can only recommend an oil to use, but they cannot require them to use it.
I believe you are correct. I think it actually may be illegal for a manufacturer to require you use a particular brand unless they provide it to you for free. Either way, I am personally completely good with using a non Motorcraft oil if it is 5W50 and API SN certified. I check oil level frequently, watch oil pressures, and change at proper intervals, and warm up engine before any spirited driving. If my engine craps out, then I know it wouldn’t be directly an oil caused failure.
 

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Have you guys been to Track Attack? One of the first things I noticed when I walked into the room were two signs in the front of the room at the Ford Performance Racing school where we were to drive the GT350s that said Castol Motor Oil, Oil of champions with the picture on the right of a Ford GT supercar and the one on the left a GT350. Now I say, if the manual says to use ONLY Ford Motor oil, why is the school showing Castol?
 
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