Another oil replacement question...

[Bdubbs]

I apologize in advance. I've read prior threads about people switching over to Amsoil. I've owned my 19 350 for a few years and always used motorcraft oil. Who knows what the previous owner used.

I'm a preferred customer through Amsoil and I'm about to order oil for my 03 cobra. I've ran Amsoil in that car for many years.

I keep going back and forth about it for the 350. It's just shy of 18k miles and I have a Ford ESP until 2030.

I also don't log many miles. Thought about buying some of their oil filters too

Sorry for beating a dead horse. I know it meets Ford's specifications. I guess I'm just looking for confirmation either way.

Thank you!

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[CorralesR]

I dont think the ESP requires Ford Motorcraft oil. Just keep oil changes documented and keep receipts. Nice collection of Stangs! I see a fox notch! I have an 03 Saleen supercharged. With an 18 GT350 and a 17 GT350R!

 

[melown]

I've been using amsoil 5w-50 since first change after break-in on my new 19 R at 940 miles. been great so far and im at 24k now. i barely burn any, maybe needs 1 or two top offs between changes. I change it after 5k miles max, usually ~3k or after it gets somewhat cooked above 250*F from a track day...or high temp road trip with mountains and high revs. Depends on your use.. Their ATF for the transmission also feels good. I wouldn't use the amsoil filter but take that from someone who stocked up on oem FL2087 when the -A variant came out.

I heard of someone in SoCal using Torco 5w-50 oil on an older daily driven GT350 (maybe first gen) and it has 100k miles. i think it has the ford spec too. take it for what its worth. I use Motul on my GTI as it seems to do better with fuel dilution, maintaining viscosity, not burning off as much, and thus having better shearing protection than liquimoly or castrol used previously.

 

[Bdubbs]

I dont think the ESP requires Ford Motorcraft oil. Just keep oil changes documented and keep receipts. Nice collection of Stangs! I see a fox notch! I have an 03 Saleen supercharged. With an 18 GT350 and a 17 GT350R!

Thank you kindly, nice collection as well! I do have a thing for foxbody mustangs. I recently replaced the intake gaskets on the 90 convertible that's kinda in the picture.

 

[galaxy]

Sounds to me like you answered your own question, LOL. 42K miles for me since the 500 mile mark. I also use the Amsoil filter. Zero concerns. We could have a whole notha thread on my opinion on just the filter, but there's enough out there on the topic. I refuse to get all caught up in the current filter hype and pay $100+ for a...no greater quality filter.

 

[Mrhavasu]

I like Amzoil, but will not run their filter. I am still running motorcraft oil in the
Shelby. I have a newer Harley and they run hot. Over 300 degrees at the heads
is not uncommon. I switched to Amzoil at about 800 miles and was extremely
surprised that I could actually feel a difference. Bike ran smoother and reved
up easier. I would have never believed it., but in my case its true. Not sure about
car oil filters, but the Amzoil oil filter for the bike was made in china, also had rust
inside it.

 

[Spart]

Amsoil is weasel-y about how they word things.

They don't actually have the Ford certification, and the majority of their oils do not have the API certification for that matter.

Here's how they word it:

APPLICATIONS
Use AMSOIL Signature Series Synthetic Motor Oil in applications that require any of the following specifications:
[snip]
5W-50 (AMR): API SP, SN PLUS, SN…; Ford WSS-M2C931-C (Mustang); GM dexos R

Notice how they don't say they actually meet the spec or are approved? Just "use in applications that require".

That's very specific legalese, and they've deliberately used this wording for a long time.

Note that this doesn't necessarily mean Amsoil's 5W-50 is a sub-par product. It's likely better than most all 5W-50's out there.

But if your concern is your warranty, use an oil that is actually API certified (you can look them up here) and one that actually has the Ford WSS-M2C931-C spec.

 

[WItoTX]

If you are tracking it regularly, I'd consider going to a 15w-50. The last time I researched it, the shear in the 15w-50 tolerates heat way better, and the oil breaks down slower.

My experience wiht Motorcraft oil is it starts to burn much faster than just about anything else on the market. I suspect it is breaking down faster than other oils. Other oils I've had good luck with no oil consumption between changes, but Motorcraft, for whatever reason, only lasts maybe 4-5 months before the car starts consuming it.

 

[galaxy]

.

Note that this doesn't necessarily mean Amsoil's 5W-50 is a sub-par product. It's likely better than most all 5W-50's out there.

Cudos for adding that part. Many will bag on Amsoil big time solely because they don’t like their business model, having never included a shred of context or otherwise that it’s an amazing, well tested, and proven product.

Oil companies pay big big bucks to have their product stamped with an API, or with a manufacturers spec approval. Not wearing that label absolutely does not mean Amsoil lacks the specs (…or exceeds is the term that comes to mind in this case), it just means they don’t play that game. Take it for what it’s worth to ya.

 

[Spart]

Cudos for adding that part. Many will bag on Amsoil big time solely because they don’t like their business model, having never included a shred of context or otherwise that it’s an amazing, well tested, and proven product.

Oil companies pay big big bucks to have their product stamped with an API, or with a manufacturers spec approval. Not wearing that label absolutely does not mean Amsoil lacks the specs (…or exceeds is the term that comes to mind in this case), it just means they don’t play that game. Take it for what it’s worth to ya.

I've never seen either a virgin oil analysis or used oil analysis of an Amsoil product make me think "wow, this is garbage." They tend to have pretty good additive packages.

That said, their marketing is weird and the way they word things leads a LOT of people to believe they are doing exactly what they need to do to maintain their warranty when they are in fact voiding their warranty and are at the mercy of the manufacturer's good will.

Using Amsoil products is one good way to give Ford an out when your $22k voodoo gives up the ghost. They shouldn't take the out because it's almost certainly not the cause of any failure, but they are well within their rights to do so.

 

[honeybadger]

Good oil. I use it exclusively in my car. Never has tested outside of the window - even when I put 9 hours on one during a long trip to multiple tracks. Oil is analyzed every change and that one came back (safe, but outside the optimal window).

That said, outside of race engines that are tolerance'd for a specific oil weight/type, I've found interval matters more than the oil itself. I change every 6 months on my non-race cars (or 50% oil life, whichever comes first). This ensures I'm never running contaminated oil and makes it easier to catch bad wear early.

 

[Sajin]

I dont think the ESP requires Ford Motorcraft oil. Just keep oil changes documented and keep receipts. Nice collection of Stangs! I see a fox notch! I have an 03 Saleen supercharged. With an 18 GT350 and a 17 GT350R!

How can we verify this? I'm currently under ESP until 2031. I'm running Amsoil SS 5w50. Thanks.

 

[Stage_3]

I have an 03 Saleen supercharged.

Would love to see the 03 Saleen!

 

[robvas]

Using Amsoil products is one good way to give Ford an out when your $22k voodoo gives up the ghost. They shouldn't take the out because it's almost certainly not the cause of any failure, but they are well within their rights to do so.

Do you have a documented case of this happening?

 

[galaxy]

How can we verify this? I'm currently under ESP until 2031. I'm running Amsoil SS 5w50. Thanks.

It’s in your owners manual and it’s covered in the Magnus-Moss act. They absolutely cannot make you (nor void your warranty for) using a certain brand of oil. Or any part or service location. But yes, it does need to meet or exceed the Ford spec.

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