Hopefully we can wait until this question gets answered:

That's really got my curiosity now too.

 

I want to see DOCUMENTED proof that 5w-20 isn't good enough and that 5w-30 provides better protection.

If the OP is all about documentation, where is his that shows its better to change.

 

My question was NOT anything to do with synthetic blend verses synthetic....nor did I spread ANY mis-information; My question did have to do with your statement of " Bottom line, per Ford engineers, changing the viscosity of the oil requires a change in the calibration of the motor, so it's in YOUR best interest to follow their specifications and stick with the 5w-20 "

Where is this statement documented? I have not found, nor has anyone been able to provide that any Ford engineer has made this statement using documented proof. Why is it that the statement "using 5w-20 requires a change in the recalibration of the motor" be considered "legit" if no documentation has been presented to back it up? You were contacted by someone that "knows what they are talking about"...I don't doubt this persons qualifications at all, but can this person provide proof through a published document to my question? That's all I ask. No doubt this person is a qualified and respected member of this forum; a valued member. I am in no way a trained or certified Ford engineer or mechanic; just someone that wants to learn.

The owners manual states using 5w-20. The only thing I can find is that TiVCT works with oil pressure, and that 5w-20 provides optimum fuel economy. Nothing in any official documentation that I have found states that any other oil viscosity will render engine damage, either now or in the future. I would think that using anything other than 5w-20 would cause damage, this would be stated in the section of the owners manual. I'm one of those who does read the owners manual, and one that questions something I do not understand.

In no way did I suggest to anyone to use a different viscosity other than what was recommended. I stated I switched because I thought going to a slightly higher viscosity would be better in the upcoming hot Florida summers coming up. Then I learned that these engines have TiVCT. It was at this point I asked for proof that 5w-30 would damage it.

And for the record, I will stick with 5w-20 in future oil changes.

In closing, thanks for explaining the reason for closing the other posts. I find these forums a good place to learn, repair, and share experiences.

 

Documented proof? I can't find any. Your car your call. I'm going to stick with what works. If it ain't broke don't fix it

 

I really don't understand why you keep asking for documentation that isn't going to exist. It's like asking for proof of something that isn't there.

They give you documentation of what WILL work. Why is that not good enough for you?

You said you don't doubt the credentials of the individual who contacted the moderator and gave him information that was apparently convincing enough to close the previous two threads. Why is that not good enough for you?

The owner's manual states that the oil needed to be used is 5w-20. Why is that not good enough for you?

What do you not understand about the impracticality of having to state, in writing, that each and every other option in oil weight and/or viscosity is NOT what you should use, because it is not the optimum oil weight for the engine in your car? How big do you think the owner's manual will be if they include that clause for every single aspect of the vehicle? Tires, brake fluid, transmission fluid, air filter, coolant, etc....Seriously, you've been told, by multiple "official" sources that 5w-20 is what you should use in your engine. Why in the world are you trying to determine whether 5w-30 is any better or worse?

The only documentation you're going to find about 5w-30 not being what your engine needs may be the report on why your engine failed at 20k miles. OR, you can just use 5w-20 and not think twice about it.

Good lord.

 

Wow, this thread is so full of fail...

Where is cinque35 with his 'In before the lock' gif?

Several folks have tried to help, but for lack of documentation it seems that no amount of logic, reasoning, or explaining what should be the correct oil will make any progress here...

I'm not surprised there's nothing found, the coyote engine is only a few years old, not like an old Ford 302/351 that's been around for decades. These new variable valve timing over head cam designs are state of the art technology. Delivering gobs of power when you want, and fuel economy when you need it, Ford delivered a real winner.

Use the recommended oil, and forget finding the documentation that doesn't exist.

 

Documentation. Documentation. BOLD!

Moar BOLD!

 

This thread has so much fail, I'm not even in it.

 

I'm winning!

 

Why would anyone have proof??? The engine validation would of been for the weight that best matched. You will not find documentation on something they wouldn't expect people to do.

 

just use what ever the hell you want man

 

Wow... I log in at night and miss all this? Is this bucko again with his "show me proof" rant???

Sigh.... Here we go again.

 

Ford doesnt need to show you why they do everything that they do.
There are reason why they recommend the oil they do.
There are reasons they used one type of fog light bulb over another as well.
Ford will not come on this board and show you the reasons why they chose 5w-20 for this motor.
The reason they won't is:
A.) why would they? 99% of customers don't care
B.) the one percent that does thinks they know better and will discredit what they say.

By continuing on an on despite being corrected by people with much more knowledge of the situation by not sticking with the factory recommendation you are saying you and some dealership tech's know more about Powertrain engineering then Ford does.

There are reasons 5w-20 is speced for your car and reasons why 5w-50 is speced for Boss/GT500 and 2013 GT track pack and those reasons are more then "just because they thought it was better".

This thread should be closed and you really should stop making threads about this. I suprised hasn't warned you about making multiple threads on the same topic after previous threads get locked?

 

enough is enough.

This has been explained, we don't need more threads on the same subject.
Closing...again..

Bucko, no more threads on the subject.

 

Won't mention any threads or posts, but I recieved an answer to my question....I took a huge risk when I talked to my local service manager about what I had done, as I openly admitted to it, and they now had it on record. If I had done damage, I was screwed.

I'm happy to report that the regional service rep got involved, and it came back from Ford who stated I did not do any damage to my engine. They did state that Ford recommends what was said here from many for "best fuel economy and performance". That I accept and do not debate.

I'm happy with my answer (finally). I still have my warrantee intact, and piece of mind knowing that no damage has, or will happen with what I did.

Thanks to all that offered opinions and comments. It's done now.

 

What did you do?

 

Thought you wanted proof Ford said not to use something different, not just no damage done.

Also, by mentioning it on here, Ford already had the info of what you did if they wanted it.....they monitor these boards.

 

This guy never quits, starting threads just to start arguments, got stopped on ME so he jumps over here

 

Is this the **** oil thing again? Seriously, is two locked threads just not enough? stfu already