GEN 2 Ford GT oil in a Raptor

[johnmh]

Oil questions can be repetitive and tiring, but here goes.

When I visited my local dealer, they advised that they fill 450 hp Ratptors with 5w30 Motorcraft semi-synthetic oil, while they fill 650 hp Ford GTs with 5w50 Motorcraft full synthetic oil. Both have versions of the 3.5 EcoBoost engine.

Given the extreme environment where my truck is used (dusty and temperatures which can hit 120 degrees f) I cannot see any harm in using the 5w50 full synthetic used in the GT; it may provide better protection at high temperatures.

If it makes a difference, every car I own gets oil and filter changes at 5000 km.

 

[nikhsub1]

Uhh, I wouldn't do that. I'd use 5w30 as the manual calls for. I'd also use full synthetic. Generally the engineers set the viscosity to the tolerances in the motor so I would definitely not use anything other than 5w30.

 

[ayoustin]

Despite what it says on paper, the reality is it's far from the same engine. Stick to 5w-30 as specified. Ford has an alternate service schedule for vehicles regularly used in dusty conditions and it's called out in the owner's manual. Use that alternate service schedule.

 

[dillard09]

I know I used 5w30 before I blew my motor. I now have a RMB fully forged motor and he recommended and what I use is Amsoil 5w50.

 

[ayoustin]

I know I used 5w30 before I blew my motor. I now have a RMB fully forged motor and he recommended and what I use is Amsoil 5w50.

Hand built engines are a different ball game. Bearing and piston to wall clearances change a lot and those play a huge part on what viscosity oils are suited best for that engine. Modern factory built engines run much much tighter clearances, so sticking with what the manual calls out is best. There are oils with better additive packages than others which can be helpful in preventing engine wear and keeping the crankcase clean but that's a pretty in depth topic.

 

[nikhsub1]

I know I used 5w30 before I blew my motor. I now have a RMB fully forged motor and he recommended and what I use is Amsoil 5w50.

Apples to oranges.

 

[Pinned]

As everyone else has said, the GT and Raptor motors are not the same.

You will get worse lubrication and less protection by going with too heavy of an oil. The iteration of the 3.5 Ecoboost in the Raptor is designed to use 5W30 oil. I would not use anything other than a full synthetic. For my own truck I have been using an oil with a higher HTHS value (high temp, high shear) than the Ford full synthetic as I think it makes sense for turbo engines that tend to shear down the oil quickly.

After some research when I got the truck I found that what you want to look for is an oil that does the following:
Full synthetic
Meets SN+ certification
Meets Ford 946-B1 specification
Has an HTHS above 3.0

If you have an oil like that and are changing it every 5,000km (roughly 3,000 miles) you're going to be in better shape than the semi-synthetic for sure.

 

[johnmh]

Thanks for the advice. I am surprised that the internal clearances would be significantly different in a Raptor vs. a Ford GT, but anything is possible (with almost 50% more hp the GT application would have to deal with more heat). As Amsoil is not available where I live, I am looking for Mobil 1, but it seems back ordered. Castrol 5w30 is only available as locally manufactured semi synthetic here, which I was less enthusiastic about.

 

[ayoustin]

FWIW, I run Pennzoil Ultra Platinum 5w-30 in my truck. They have an online schedule where you make an account and provide details like proof of oil purchase and mileage on the vehicle for each oil change and they'll warranty your engine for 15 years or 500k miles. Doesn't cost a single penny, you just have to make sure to fill out the form every time the oil is changed.

15 Years or 500,000 Mile Protection Guaranteed*

Check out the Pennzoil up to 15-Year/500,000-Mile Lubrication Limited Warranty that is FREE with the purchase of any Pennzoil motor oil.

www.pennzoil.com

Specs for it:

https://www.shell-livedocs.com/data/published/en-US/b7a53dd0-2f04-4910-b035-c4234c72c0d6.pdf

 

[nikhsub1]

The ultra platinum is great oil.