Oil options for a 2016 Ford Shelby GT350

[d00df00d]

Originally Posted By: Pablo
Ford WSS-M2C931 spec requires the product to meet API SN, be full synthetic, 5W-50, and just a touch better deposit control than API SN (it’s still an easy one pass though). AMR crushes the requirements, and is fully suitable for use in Mustangs calling for the spec. In fact, those applications are the sole purpose that AMR was designed for.

Interesting.

In that case, why no "meets or exceeds" language?

 

[Pablo]

Originally Posted By: d00df00d
Originally Posted By: Pablo
Ford WSS-M2C931 spec requires the product to meet API SN, be full synthetic, 5W-50, and just a touch better deposit control than API SN (it’s still an easy one pass though). AMR crushes the requirements, and is fully suitable for use in Mustangs calling for the spec. In fact, those applications are the sole purpose that AMR was designed for.

Interesting.

In that case, why no "meets or exceeds" language?


Because Amsoil isn't claiming API SN compliance so therefore they are not claiming it meets the words of the specification. But the oil meets and exceeds the PHYSICAL requirements of the specification.

 

[kschachn]

Originally Posted By: Pablo
Because Amsoil isn't claiming API SN compliance so therefore they are not claiming it meets the words of the specification. But the oil meets and exceeds the PHYSICAL requirements of the specification.


Such as what? There are non-physical aspects of the specification?

And yes, specifications are "words" but those words detail physical attributes.

 

[Pablo]

Originally Posted By: kschachn
Originally Posted By: Pablo
Because Amsoil isn't claiming API SN compliance so therefore they are not claiming it meets the words of the specification. But the oil meets and exceeds the PHYSICAL requirements of the specification.


Such as what? There are non-physical aspects of the specification?

And yes, specifications are "words" but those words detail physical attributes.


Such as API SN. Yes there are.

Amsoil exceeds all the detailed physical attributes.

 

[CJs06]

Originally Posted By: Doublehaul


Quote:
Use Motorcraft SAE 5W-50 full synthetic or an equivalent SAE 5W-50 full synthetic oil meeting Ford specification WSS-M2C931-B.


Here...Ford has made it very easy for you. Follow this and worry about your tires or something else.


lol, way ahead of you.

Originally Posted By: Doublehaul
Honestly I think the MC oil is absolutely fine and you will not be doing any good to switch to something different. Your engine did NOT fail because of oil.

These things just happen...its why we have warranties.


Of course the spun bearing wasn't caused by oil. Likely, a lack there of. Still speculation though, cause I don't know what Ford determined was the root cause, whether it be oil starvation, defective bearing, improper installation, etc.

It wouldn't be BITOG if there wasn't discussion about oil options, otherwise, we'd only follow our manuals, never buy competitive products and pay whatever dealerships would charge for oil changes.

 

[CJs06]

I do plan on taking an oil analysis of the factory fill from the new engine. I'll post the results for future reference.

 

[d00df00d]

Oddly, given the scarcity of publicly available knowledge and expertise about oil -- including on this website -- I think encouraging people to read the manual might be one of the best services performed by this website. It seems to me that for most people who don't know anything about oil, they don't blindly follow the manual; they take it to a lube joint or their local mechanic and have no idea what's going in.

Was recently near a gas station and service center near me, where I often see a lot of upscale German cars. I had seen the station attendant topping off a BMW with a bottle I didn't recognize, so I went in to ask what they used. Turns out it was the wrong kind of 5w-30 synthetic, which is a SUPER common mistake with BMWs. There wasn't even a single BMW-approved oil on the shelf.

RTFM might seem lame on a website that's supposed to have a lot of oil experts on it (they mostly left or stopped posting years ago BTW). But it's WAY better than what most people do out of ignorance.

 

[bdcardinal]

What is interesting is the new Ford GT does not recommend the Motorcraft 5W50. I was just cruising the shop manual and it says to use "Castrol Edge Supercar 5W50" in multiple places in the shop manual.

 

[kschachn]

Originally Posted By: bdcardinal
What is interesting is the new Ford GT does not recommend the Motorcraft 5W50. I was just cruising the shop manual and it says to use "Castrol Edge Supercar 5W50" in multiple places in the shop manual.


Which according to the PDS is approved for vehicles requiring Ford WSS-M2C931-C.

 

[thastinger]

Realize this is on older thread but thought I would just throw this in since I have first-hand experience.

My 13 GT500 also calls for 5W50 but I have NEVER ran it. I have had several Ford modular motors in the past and they all called for 5w30 or 5w20, the 5.8 in my 500 is just a hogged out mod motor, all bearing tolerances are the same as what my 98 5.4 mod motor is. I called Shelby and the SVT team before I made my decision, both said 5w50 is speced simply considering potential severe service duty of the engine. Since I don't race mine, it has had 5w30 since it was new, now at 18K with not one single issue.

 

[dave1251]

Originally Posted by thastinger
Realize this is on older thread but thought I would just throw this in since I have first-hand experience.

My 13 GT500 also calls for 5W50 but I have NEVER ran it. I have had several Ford modular motors in the past and they all called for 5w30 or 5w20, the 5.8 in my 500 is just a hogged out mod motor, all bearing tolerances are the same as what my 98 5.4 mod motor is. I called Shelby and the SVT team before I made my decision, both said 5w50 is speced simply considering potential severe service duty of the engine. Since I don't race mine, it has had 5w30 since it was new, now at 18K with not one single issue.



If your not tracking your GT500 every weekend with 10K+ OCI's this is what I expect.

 

[anndel]

Here's from my experience and not defending a particular brand. My 1993 Toyota pickup my wife (girlfriend back then) bought brand new. After 500 miles, I drained the factory oil and replaced it with Amsoil as my off road buddy was a Amsoil dealer. Since then, it's always on Amsoil and switched to SS back in 2000s using Amsoil or OEM Toyota filters. OCI was 10,000 miles but it was 2 years to drive that mileage and in 2014, I partially overhauled the engine - timing chain, water pump, oil pump checked both decks (cylinder head and engine block) for warpage, pistons, rings, crankshaft, valvetrain and it looked very clean. My coworker saw photos of it and was amaze how clean it was with about 150,000 miles. That's my experience and I will stick with what works for me. The only wear was on the valvetrain which Toyota had an issue with doesn't have enough or large enough oil holes and I replaced it with an aftermarket valvetrain with larger and more holes.

The engine is a 22RE 4 cylinder engine with Amsoil SS 10W-30 and Toyota OEM filter, changing the filter only next month.

 

[DrivinWest]

Originally Posted by CJs06
I was still on the factory fill oil that came in the engine at 5000 miles when the bearing spun.

I have a 2016 GT350R with almost 5000 miles on it. About 250 of those miles are on track, including COTA in June with and ambient temperature well over 100F.

When new, my engine consumed oil pretty quickly. It eventually leveled out. Many others have had similar experiences, but that's based on forum anecdotes not rigorous data analysis.

These engines have piston flutter right in the RPM range you're in when just driving around town and not really getting on the throttle. Flutter leads to oil consumption as the rings aren't square against the cylinder walls. My theory: owners who drive these cars causally and don't check the oil are the ones having engine problems due to oil starvation.

Did you add any oil in that 5000 miles? If not I'd bet good money that your engine died of oil starvation.

FWIW, I use 5W50 and have changed the oil three times in 5000 miles. Overkill? Probably. I do the changes myself so I know that they're done right.