Engine oil weight after installing the FRPP3?

[kms0567]

I have FRPP3 installed on my 2017 Mustang GT and I am trying to change the engine oil soon. I have been using Amsoil SS 5w-20, and not sure if I need to get a different weight or stay with 5w-20. I haven't tried any other weights before.
Thanks in advance!

Sponsored

 

[Faceme]

I ran 5w-30, 0w-40, 5w-30 again. No difference. As long your not running some abnormal weight oil, it doesn't matter, as discussed a kajilllionnn times before on this site. Oil quality is of more importance imo.

 

[VooDooDaddy]

I don't know why people question the oil viscosity recommendations made by a company that spends tens of millions of dollars to research, develop, and warranty their products?

 

[UAmach1]

I don't know why people question the oil viscosity recommendations made by a company that spends tens of millions of dollars to research, develop, and warranty their products?

Because engineers say one thing but marketing say another.

In the 2000's all the Fords moved from Xw30 to Xw20. Even engines that had been made well before then. A 2000 car would ask for 5w30 and the 2001 identical car would ask for 5w20. If you asked the dealership or any of the marketing they would tell you to use 20, but all the engineers would tell you not to run anything less than 30.

Why?

Because 20 JUST met the requirements for warranty and gave a fraction of a bit better MPG, despite the fact the engine, not changed since 1996, was designed for 30. Since then I listen to what Engineers that designed the car tell me should be used for protection. Not marketing paper work.

I never moved to 20 for my Escort until it was simply my daily driver when I got my Mustang, and I ran 0w40 when I went to the track and 5w30 any other time. I NEVER ran 20 in it. Both engines were designed in 1995-1996(original planning probably well before that) before the CAFE standards tightened and neither were designed with 20 in mind, yet both got updated manuals saying to run 20. Would you run 20 in a 1996 Cobra? Same engine.

 

[BmacIL]

Because engineers say one thing but marketing say another.

In the 2000's all the Fords moved from Xw30 to Xw20. Even engines that had been made well before then. A 2000 car would ask for 5w30 and the 2001 identical car would ask for 5w20. If you asked the dealership or any of the marketing they would tell you to use 20, but all the engineers would tell you not to run anything less than 30.

Why?

Because 20 JUST met the requirements for warranty and gave a fraction of a bit better MPG, despite the fact the engine, not changed since 1996, was designed for 30.

Since then I listen to what Engineers that designed the car tell me tell me. Not marketing paper work.

You're not really correct here, and I have the background to tell you this. Ford literally beats a good number of engines to hell and back on the dyno and in the real world. They are tested to far beyond warranty and pushed that way to useful life. This is much harder duty than most customers will get close to, and it's done for >=150k miles. They also make sure to test engines with specific components at the outsides of the tolerance bands to make sure any engine with parts in spec will live, too. They do all this with the factory recommend oil. A change to a lower weight cannot and is not done by marketing. Engineering alone is given economy targets and has to develop robust solutions to get there. With ever-advancing synthetic and synthetic blend oils, this is a lever they can pull, while still validating the product all the same.

 

[UAmach1]

You're not really correct here, and I have the background to tell you this. Ford literally beats a good number of engines to hell and back on the dyno and in the real world. They are tested to far beyond warranty and pushed that way to useful life. This is much harder duty than most customers will get close to, and it's done for >=150k miles. They also make sure to test engines with specific components at the outsides of the tolerance bands to make sure any engine with parts in spec will live, too. They do all this with the factory recommend oil. A change to a lower weight cannot and is not done by marketing. Engineering alone is given economy targets and has to develop robust solutions to get there. With ever-advancing synthetic and synthetic blend oils, this is a lever they can pull, while still validating the product all the same.

OK then you can counter argue the Ford Engineers that say otherwise over on other sites. There are multiple that say they would never run 20 in their cars and I'll take their word over a printed piece of paper. One of the main posters on the old Escort sites is a guy that worked on the ZX2 project, he blatantly told people to not bother with 20 unless they were ONLY doing normal commuting as the results for 20 passed all test but BARELY, and he didn't feel comfortable saying it was okay to run. There are others on BobIsTheOilGuy that say the same for the Mustang 4.6. Did it pass? Sure, but do they trust it? Hell no. Similar conversations have been had on the SVT site.

Would you rather have a Doctor that passed his exams do your surgery? or one that exceed them do it? Because C- is a passing grade. Everything I've seen says that 20 got a C-.

Maybe the 5.0 is different as it may have been designed with 20 specifically in mind, but I plan to definitely ask around first.

 

[white15gt]

One thing to keep in mind, and for some reason, very few people seem to talk about this. The VCT in the Coyote requires specific oil pressures to operate properly. The VCT is calibrated for the pressures associated with 5w20...

 

[BmacIL]

OK then you can counter argue the Ford Engineers that say otherwise over on other sites. There are multiple that say they would never run 20 in their cars and I'll take their word over a printed piece of paper. One of the main posters on the old Escort sites is a guy that worked on the ZX2 project, he blatantly told people to not bother with 20 unless they were ONLY doing normal commuting as the results for 20 passed all test but BARELY, and he didn't feel comfortable saying it was okay to run. There are others on BobIsTheOilGuy that say the same for the Mustang 4.6. Did it pass? Sure, but do they trust it? Hell no. Similar conversations have been had on the SVT site.

Would you rather have a Doctor that passed his exams do your surgery? or one that exceed them do it? Because C- is a passing grade. Everything I've seen says that 20 got a C-.

Maybe the 5.0 is different as it may have been designed with 20 specifically in mind, but I plan to definitely ask around first.

You think they still do things the same way they did 20-25 years ago?

You're also assuming that all 5W20 oils (even among synthetics) are equal, or relatively equal; they're not. There are many that retain their protection at very elevated temps (over 270 F), and do better than many 'top' 5W30 oils at those temps. Oil flow and film durability are what matters most for protection. Higher viscosity oil flows worse. You want to run as thin of oil as you can get away with while maintaining adequate film strength for best overall protection. The best modern oils have awesome additive packages that keep them strong for longer and higher temps. Just playing the 20 vs 30 vs 40 is making this way too simple of a problem.

 

[Olivas]

One thing to keep in mind, and for some reason, very few people seem to talk about this. The VCT in the Coyote requires specific oil pressures to operate properly. The VCT is calibrated for the pressures associated with 5w20...

Except the 12/13 Boss, GT500s, and GT350s which specs at 5w-50. :shrug:

The GT500 and GT350 you could argue are engineered differently since are larger motors, but the Boss was still a 5.0 coyote.

True difference between the cars and the recommended oil spec is simply the intended driving purpose.

5w-20 is fine for a daily driver and not going to give you any issues there. However, if you're racing, or otherwise beating on your car, you're going to want something in a higher weight for more protection.

 

[jasonstang]

Because engineers say one thing but marketing say another.

In the 2000's all the Fords moved from Xw30 to Xw20. Even engines that had been made well before then. A 2000 car would ask for 5w30 and the 2001 identical car would ask for 5w20. If you asked the dealership or any of the marketing they would tell you to use 20, but all the engineers would tell you not to run anything less than 30.

Why?

Because 20 JUST met the requirements for warranty and gave a fraction of a bit better MPG, despite the fact the engine, not changed since 1996, was designed for 30. Since then I listen to what Engineers that designed the car tell me should be used for protection. Not marketing paper work.

I never moved to 20 for my Escort until it was simply my daily driver when I got my Mustang, and I ran 0w40 when I went to the track and 5w30 any other time. I NEVER ran 20 in it. Both engines were designed in 1995-1996(original planning probably well before that) before the CAFE standards tightened and neither were designed with 20 in mind, yet both got updated manuals saying to run 20. Would you run 20 in a 1996 Cobra? Same engine.

I think the fact is oil from 1990's was not as good as oil from 2000's. Same here is also happening. Oil gets more and more stable holds it's viscosity better and better. Enough additives to go 10k miles which is unheard of in the 1990's.
Also engine tolerances are better, the material is better, so is the design meaning the abuse on oil is a lot less.

 

[jasonstang]

Except the 12/13 Boss, GT500s, and GT350s which specs at 5w-50. :shrug:

The GT500 and GT350 you could argue are engineered differently since are larger motors, but the Boss was still a 5.0 coyote.

True difference between the cars and the recommended oil spec is simply the intended driving purpose.

5w-20 is fine for a daily driver and not going to give you any issues there. However, if you're racing, or otherwise beating on your car, you're going to want something in a higher weight for more protection.

Exactly 5W20 is fine for 99% of the customers where only 1% of them will need 5W50 why spec an oil that is too thick just for the 1%?
If I am racing my Coyote I too would change to 5w30 or even 5w40 for better high temperature protection but after the track day is done, I would change back to 5w20 for daily use.

 

[white15gt]

Except the 12/13 Boss, GT500s, and GT350s which specs at 5w-50. :shrug:

The GT500 and GT350 you could argue are engineered differently since are larger motors, but the Boss was still a 5.0 coyote.

True difference between the cars and the recommended oil spec is simply the intended driving purpose.

5w-20 is fine for a daily driver and not going to give you any issues there. However, if you're racing, or otherwise beating on your car, you're going to want something in a higher weight for more protection.

They had different calibrations...

 

[EFI]

I don't know why people question the oil viscosity recommendations made by a company that spends tens of millions of dollars to research, develop, and warranty their products?

Because when Ford engineers developed said recommendations for oil back in say 2014 they accounted for a 7000rpm engine with 435hp (among many other things).

The FRPP3 raises power and RPM considerably, so the original recommendation may or may not be relevant still.

 

[Kinjirra]

Does anyone have any data to suggest or proof that the factory spec oil is causing failures(spun bearing, thrown rods or whatever...) VS. a heavier weight oil?

I don't think I have seen any solid evidence to date on that.

Now when I ran subies it was common to see someone spin bearings and be running Mobil 1. But people backed that up with pictures and data.

All that being said I upgraded to 5w-30 due to the fact I like to beat on mine abit and well Its easier to find the Penzoil ultra plat in that weight around here.

 

[Strokerswild]

I run Mobil 1 5W-30 in my Mustang simply because that's the oil weight the rest of The Fleet takes, and I buy in bulk when on sale.

Never an issue.

Sponsored