FORD Gen 3 Coyote engine tolerances good for 15W-50 engine oil in the summer?

[Mtnbiker]

It seems to me that 15W-50 would be a great engine oil to run in this engine for both road courses and daily driving in the summer since the temperature stays warm. The only question I have is the tolerances are the too tight for the bearings and such? Does it need a more watery engine oil?
Thank you.

Moderator’s edit: shortened the super long title

 

[Mtnbiker]

If it matters, I have a 2022 MACH 1.

 

[Rand]

oh no you started it now "tolerances".



Answer: yes.

PS: https://defiancemachine.com/the-difference-between-tolerance-and-clearance/

 

[ripcord]

oh no you started it now "tolerances".



Answer: yes.

PS: https://defiancemachine.com/the-difference-between-tolerance-and-clearance/

Hey! I'm not nit picky, I'm just pedantic.

 

[bdcardinal]

My 2014 Track Pack that calls for 5W50 has the same main bearing clearance spec, 0.0010–0.0018 in (0.025–0.045 mm), as yours. Also the different places that add superchargers to these say to run 5W50, so I wouldn't see a problem. Now this is assuming there is no warranty so there is that.

 

[SubieRubyRoo]

If the running oil temps are above 220*F, and the coldest starts are above zero, there’s no issue at all.

 

[chris719]

There won’t be a problem but I’d just run a 5W-50 personally.

 

[Mtnbiker]

There won’t be a problem but I’d just run a 5W-50 personally.

This question is for all of you.
I use 5-50 now. Why wouldn’t 15w-50 Mobile 1. be even better? Especially on road courses HPDE, where a lot more heat is built up? What would the drawback/s be?
The pluses as far as I understand is the better bearing protection/metal on metal(without oil or to watery oil).
Also it would not be as likely to shear. Although I change my oil far more frequently than those that only drive to to store or never build any heat in the engine. So the oil shearing is probably not an issue in this case. Am I wrong about the shearing? I change my oil after hundreds to only a thousand miles up till now and I am thinking this is stupid and wasteful with Mobil 1 SUPERCAR 5W-50.
At my temperatures what benefits are there to even using a 5W-50?
Thank you.

 

[chris719]

5W-50 Supercar is a cutting edge formula. 15Ws are often older or afterthoughts. A higher winter rating doesn’t necessarily mean the oil is thicker at operating temperatures. It mostly matters for shear resistance which is good in modern multi-grade oils. In any case the HTHS of the 5W-50 either FS X2 or Supercar is likely enough for you.

 

[Mtnbiker]

5W-50 Supercar is a cutting edge formula. 15Ws are often older or afterthoughts. A higher winter rating doesn’t necessarily mean the oil is thicker at operating temperatures. It mostly matters for shear resistance which is good in modern multi-grade oils. In any case the HTHS of the 5W-50 either FS X2 or Supercar is likely enough for you.

Again for all that have education and experience with this matter is appreciated.
The other nice thing is that mobile one 15 W 50 is a good bit cheaper than the SUPERCAR.
Am I in any way providing less protection for my engine by using 15w-50 Mobil 1 full synthetic?
Thank you folks!

 

[ka9mnx]

They are both 50 grade...

 

[Dave Hess]

My son has a 2020 GT PP1 and I do all the maintenance.
Last oil change was M1 0W40.

The engine has JLT catch can and does have a nice amount of oil.

 

[Hohn]

My son has a 2020 GT PP1 and I do all the maintenance.
Last oil change was M1 0W40.

The engine has JLT catch can and does have a nice amount of oil.

So you have a good bit of oil carryover in the crankcase gases? Not exactly a resounding endorsement.

 

[Hohn]

Again for all that have education and experience with this matter is appreciated.
The other nice thing is that mobile one 15 W 50 is a good bit cheaper than the SUPERCAR.
Am I in any way providing less protection for my engine by using 15w-50 Mobil 1 full synthetic?
Thank you folks!

They are both 50 grade...

Exactly.

The "protection" is largely from the additive pack and from being a 50 grade. LSJr's last video on the M1 15w50 actually suggest lower wear in the SP formula than in prior versions.

I'd not hesistate to run the M1. The Supercar is going to last longer and allow longer drain intervals and especially provide a much wider real world operating range with the superior VIIs they use.

But if you don't plan to push drain intervals and aren't wanting to leave the oil in through some pretty cold winters, then the M1 is perfectly sufficient. It's not like a car like this is racking up 20k miles a year AND going to the track, right?

Realistically it's a couple track days and like 3k-4k miles at most in the summer time. Change the M1 once a year and get on with life.

 

[RevvCats]

You can run 50 weight oil all you want, heck if you look at the specs for Motorcraft 5w-50 the it’s almost a 60 weight oil. Downside if you’re not track driving is lower mpg. If you’re just daily driving these engines can run 20 weight oil without a problem.

I had 8 quarts of total ineo mc3 5w-30 and 2 quarts of HPL EC30 in previously. Cold start oil pressure with outside temps in the low 50s (Fahrenheit) was right at 40 psi, hot idle pressure was around 15 psi.

In goes the Mobil 1 15w-50, cold start pressure is now around 47 psi and hot idle pressure is higher but still under the 20 psi hash mark so let’s say 18 psi. Oil temp measured at the filter went up around 5 degrees F.

I’m running this stuff because I’m curios how the viscosity holds up to track use.

Edit: I looked through my phone and I have a video of a winter cold start in 28F weather with 5w-20 in the engine and pressure was just over the 50 psi mark so the 15w-50 oil pressure in cool weather isn’t pushing the engine into some abnormal operating condition.

 

[pzev]

15w50 would be fine in a coyote in the summer, as would 5w50. I thought about taking 15w50 for a whirl in my GT500 next track day, but I want to burn through some of my stash of 5w50 before I do. For an unmodified street driven Coyote, I'd probably go with 0w40.

One thing to keep in mind, Ford mandates oil changes every 4hrs of track driving, and having done oil analysis after a track day, I can attest their recommendation is reasonable. It is best to keep your street and track fills separate, and try to change the oil after every full track weekend.