Good point. I guess I'm just being over protective with the amount of mileage I'm putting on my Mustang per week (right at 1000) plus at average cruising of 75 to 80.

My concern now is if there's any truth to the thicker oil (5w-30 verses 5w-20) doing any difference in the way of the TiVCT. I plan to call my Ford service tomorrow to get it from them.

 

Stick with the recommended oil viscosity. If you want an extra level of protection, then go with a quality full synthetic instead of the syn blend.

 

^This! x 1,000,000


Stick with the specified oil viscosity. Don't over think the wheel.

 

1000 a week!

 

This begs the question? Did an assembly line professional simply make a mistake and install the wrong oil filler cap.

 

UltraKla$$ic's 2013 GT engine bay from another forum

 

I know the Track pack GT uses 5w-50 for sure

 

Of the two caps posted in pics, one says full synthetic, the other only Motorcraft.....plus different weights. Sounds like different strokes for different engine packages. Might want to really pay attention to what the shops put in. Some may just see a Mustang......it gets this......done....next......

 

Why would the track pack require 5W-50? I thought it was just a chassis upgrade.

 

The boss uses 5W-50 as well. Higher weight oil is common in road racing due to the much higher engine temps that come from being on track

 

Hence why some people decide to go 5w30
In their cars instead of 550

 

Good info..thanks..

 

I get why people are doing it but like I already explained due to TiVCT you should not change viscosity from what it came with

 

Which is why you have the multi-viscosity rating; 5W when cold to flow, and 20 when the engine (and oil) heats up. The additives in engine oil cause the oil to increase viscosity (thickens slightly) due to "bonding", providing good flow and viscosity at higher temps.

 

Rather than discuss this isse here (it's already three pages), I opened a new thread about this. I had a good 45 minute discussion with several Ford mechanics yesterday afternoon on my way home from work. Bottom line, a 5w-30 will not effect the TiVCT. I did not discuss any higher viscosity, since I have no dogs in that race. But my adding 5w-30 Mobil 1 Gold is not going to have any ill effect on the engine or it's performance, and will not harm it according to the Ford mechanics.

So my debating this is done. By all means, the 5w-20 is prefered for all climate conditions; my changing to 5w-30 for my driving conditions was not an issue with the mechanics.

 

I love that dealer mechanics are now the subject matter experts on this and not the engineering team who designed and built the thing......

Anyway stop spreading mis-information. You should NOT change the oil viscosity from what your car was factory equip'ed with.

The engine calibration is viscosity specific and there are implications to changing it.
The Boss 302 calibration for TiVCT had to be tweaked to accommodate the 5w-50 oil.

You should not deviate from factory oil viscosity specifications period

 

I love how everyone that can do a oil change is now a expert..

 

I'm not going to say mechanics aren't smart or good in their field,
but this is sorta like asking a hardware tech how his stuff is going to react to overclocking it. He may be good at fixing computers, but I'd go with the engineers who built the thing and tested it on this one.

We don't need to bring up a million threads on this.And this has been talked about before.
Do what you will with your own vehicle, but there is a reason for the recommendations as others have clearly stated.

Closing