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Discussion Starter · #1 ·
Have an 06 I-4 manual and I want to change out the oil. What does the manual transmission require? I'm guessing a 75W-90. I want to change the oil to a synthetic and I'm going to buy some Amsoil Synthetic gear oil but I need to know what weight and how much it takes. If someone could help me out, I'd appreciate it.
 

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Discussion Starter · #3 ·
Changing the gear oil to another approved oil is not going to void my warranty. That's like saying my warranty will be voided if I use oil other than MC, which isn't true. I'm pretty sure it's a GL-4 75W-90, I'm just asking if anyone can confirm this and what the quantity is. Changing my gear oil to a synthetic gear oil that is an approved oil, will not void my warranty. I'd win this 100 out of 100 times.
 

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According to the owners manual, and to the 2007 Ford/Helms Service manual, it specifically says NOT to use synthetic, which I can only assume has to do with the seals. I left the books at my dad's house, but I'll be up there this weekend installing my short shifter and working the paint a bit with my new PC polisher and some Poorboys.
 

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Discussion Starter · #5 ·
swoosh, can you please provide me that part from the manual when you get to your father's house this weekend? I have a hard time believing using a synthetic oil will be detrimental to seals. Everything that was said on BITOG leads me to believe this is just another ploy to have your vehicle serviced by the dealer. There is no way that Ford could void a warranty based on transmission trouble using a synthetic. There's no way they could prove that a synthetic gear oil rather than a conventional gear oil caused a problem if it's an approved GL4.
 

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[quote author=mrc link=topic=81093.msg1503981#msg1503981 date=1182394708]
Have an 06 I-4 manual and I want to change out the oil. What does the manual transmission require? I'm guessing a 75W-90. I want to change the oil to a synthetic and I'm going to buy some Amsoil Synthetic gear oil but I need to know what weight and how much it takes. If someone could help me out, I'd appreciate it.


[/quote]

Hi mrc. :wavey: I have an MKZ, so my Owners Manual is different. Therefore I went to the Ford Fleet website and downloaded your 2006 Fusion manual. Do you have your Owners Manual?

It shows your lubricant specs on page 246: Manual Transaxle Fluid. Motorcraft 75W-90 gear oil (non synthetic). Ford Part # F32Z-19C545-MA. Ford Specification WSS-M2C203-A1.

As you can see, it does specifically state "(non-synthetic)". That doesn't mean Ford may not okay a synthetic gear oil in the near future, but for now, non-synthetic is the specification. As far as I can find, the manual does not specify why you cannot use synthetic. The fact that it does is good enough for me.

Perhaps you can ask your Dealer if there is now an approved Synthetic Manual Trans Gear oil?

Now, what you do with your vehicle is up to you. However, Ford certainly can void your warranty if you use a lubricant which is clearly not approved for use, and you later have a transmission problem.

You most likely will never have a problem, and if you do, they may not even notice the improper fluid. Or they may notice but not care.

However, you do put yourself in unnecessary jeopardy if use the wrong lubricant. If you have a problem which in any way can be lubrication related, and Ford finds an unapproved lubricant present, they would not need to prove anything.

In my opinion at least, it is not worth the risk. Once the car is out of warranty, you are free to do whatever you wish.

Good luck. :cheers:
 

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Discussion Starter · #7 ·
The reason is simple, Ford does not have a branded "Synthetic" 75W-90 gear oil. They do have a Ford 75W-140 SYNTHETIC gear oil. In this application, they use the 75W-90 gear oil and not the 140. Since they don't make the 75W-90, it would seem silly that they would recommend a synthetic fill.

If you look in the owner's manual, it also lists Motorcraft 5W-20 synthetic blend...does this mean you can't use a full synthetic? Certainly not...the use of a full synthetic 5W-20 will not void your warranty. There is no way they could prove that a synthetic degraded your engine. That's just heinous. Going by the owner's manual just tells you what came in your vehicle originally and what they want you to use...their brands. There is no reason that a synthetic gear oil meeting the same specs would do any harm to this transmission and if Ford tried to void my warranty, I would win it...Amsoil recommends their synthetic for this application and they have stated numerous times that if any company tried to void your warranty due to the use of their approved products being used, they have the ammunition and proof to prove otherwise.

Read this thread:

BTW, I'm the original poster in it...I didn't know, but all 75W-90 IS synthetic. Here's an excerpt from one reply:

"Told by who??? wheres does this taurian excrement come from? Backhand 'who' for me. You need to stop listening to what these clowns are telling you and ask for proof in writing.

80w90 tends to be mineral. When requiring a 75w90, the 75w just about mandates the usage of the word 'synthetic'.

Since you require a 75w90, which is the spec, USE IT"


http://theoildrop.server101.com/forums/showflat.php?Cat=0&Number=919394&an=0&page=0#Post919394
 

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[quote author=mrc link=topic=81093.msg1508809#msg1508809 date=1182542520]
The reason is simple, Ford does not have a branded "Synthetic" 75W-90 gear oil. They do have a Ford 75W-140 SYNTHETIC gear oil. In this application, they use the 75W-90 gear oil and not the 140. Since they don't make the 75W-90, it would seem silly that they would recommend a synthetic fill.

If you look in the owner's manual, it also lists Motorcraft 5W-20 synthetic blend...does this mean you can't use a full synthetic? Certainly not...the use of a full synthetic 5W-20 will not void your warranty. There is no way they could prove that a synthetic degraded your engine. That's just heinous. Going by the owner's manual just tells you what came in your vehicle originally and what they want you to use...their brands. There is no reason that a synthetic gear oil meeting the same specs would do any harm to this transmission and if Ford tried to void my warranty, I would win it...Amsoil recommends their synthetic for this application and they have stated numerous times that if any company tried to void your warranty due to the use of their approved products being used, they have the ammunition and proof to prove otherwise.

Read this thread:

BTW, I'm the original poster in it...I didn't know, but all 75W-90 IS synthetic. Here's an excerpt from one reply:

"Told by who??? wheres does this taurian excrement come from? Backhand 'who' for me. You need to stop listening to what these clowns are telling you and ask for proof in writing.

80w90 tends to be mineral. When requiring a 75w90, the 75w just about mandates the usage of the word 'synthetic'.

Since you require a 75w90, which is the spec, USE IT"


http://theoildrop.server101.com/forums/showflat.php?Cat=0&Number=919394&an=0&page=0#Post919394
[/quote]

Hi mrc. :wavey: I am not trying, nor do I want to argue. It is your vehicle. You can put whatever you want into it. We are just giving you the appropriate warnings.

Your original post asked what the manual trans required, and several of us found the lubricant specifications from the Owners Manual for you. I am still wondering, do you have your Owners Manual?

I was just trying to help you, and give you the information as it would come from Motorcraft's, New York District Service Adviser (my Father, a very intelligent man, who unfortunately is now gone and very much missed).

Again, maybe your best bet would be to ask the Dealership Service Department if there is any approved Synthetic Gear oil. At least you would be covering your butt that way.

Good luck with whatever you decide to do. :cheers:
 

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[quote author=mrc link=topic=81093.msg1508843#msg1508843 date=1182543141]
Oh, btw

HI BBF :wavey:
[/quote]


:hug: Hello again mrc! :wavey:
 

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Discussion Starter · #11 ·
bbf, I know you're not arguing with me...I didn't take it that way at all. It just seems absurd. I doubt very much Ford will tell me that I can use a synthetic because they don't sell one. Well, synthetic by name...it appears that all 75W-90 are actually considered synthetics from what transpired in that thread I posted. Perhaps not all are full synthetics.

BTW, I have an owner's manual but I know what they are...just fluff to tell you about factory fills and what's recommended. Ford also recommends BP gas...I use Shell. My warranty won't be voided for using that.
 

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[quote author=mrc link=topic=81093.msg1508893#msg1508893 date=1182543774]
bbf, I know you're not arguing with me...I didn't take it that way at all. It just seems absurd. I doubt very much Ford will tell me that I can use a synthetic because they don't sell one. Well, synthetic by name...it appears that all 75W-90 are actually considered synthetics from what transpired in that thread I posted. Perhaps not all are full synthetics.

BTW, I have an owner's manual but I know what they are...just fluff to tell you about factory fills and what's recommended. Ford also recommends BP gas...I use Shell. My warranty won't be voided for using that.
[/quote]


Hello again mrc! :wavey: By the way, your analogy to the motor oil specification (semi-synthetic vs. synthetic) may be a good one. Maybe there is a Synthetic Manual Trans Gear oil which meets the Ford Specs and would be acceptable for use.

Again, for what it is worth, I would ask the Dealership Service people. If it meets the particular Ford specification, then you are safe.

And thanks for understanding that I am only trying to help. :bowdown:

Good luck! :cheers:
 

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Discussion Starter · #13 ·
I know, bbf...you're being helpful, I appreciate it. I appreciate all the help from other members on this site as well. I guess that's why we're all here.

At any rate, Amsoil Synthetic 75W-90 is a GL-4 and it is also listed as being approved for use with Mazda vehicles.

Recommended for synchronized manual transmissions and transaxles that require 75W-85, 75W-90 or 80W-90 viscosities and any of the following performance specifications: API GL-4 and MT-1, ZF TE-ML 02B, 16A, 17A and 19A, Chrysler MS-9070, MAN 341 ML.
 

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Discussion Starter · #14 ·
Amsoil Synthetic 75W-90 in the manual I4 = BIG DIFFERENCE. The shifting is so much more fluid now. No fighting to get the vehicle into reverse and I am able to switch gears with the force of my index finger. I recommend this 15 minute fluid change to anyone. Less than 3 quarts is needed.
 

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Our transaxle is the Mazda G5M which Ford also put in my '99 Escort ZX2 filled with plain 'ol Mercon ATF. FYI:The owner's manual speced Mercon. I drained that out at 8K and refilled with Redline D4 ATF and ran that 'till 50K. I then drained that and refilled with Specialty Formulations MTL-P. My Escort's G5M was great and never gave me trouble. It shifted the best with the MTL-P, which, IIRC was a 75W80. I will say that my Fusion's G5M with the factoy fill shifts like butter and better then my Escorts' G5M. I'm looking foward to see how well it shifts with either Redline or Amsoil.
 

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Did this topic die? Kind of wondering what the concensous was. I agree with marc though, but thats just my two cents. I have been using synthetic in cars since my 84 Honda Accord and nothing leaked past those seals and that was years before synthetic was even available. I can't see a new car not being able to have seals that will leak if you use synthetic. I also don't care about new car warranties, but again thats just me. I read a thread on here linked to a Mazda about using MTX oil rather than straight gear oil. Only thing different I can figure is the additives and dispersants probably used for synchros and that is probably because it was redline as opposed to someone else. I also agree with the fact that if Ford doesn't have a synthetic based oil to use they won't recommend it. BTW- what a difference synthetic made! Smooth as butter and the car seems to be effort less....
 

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Discussion Starter · #17 ·
I went with the Amsoil MTG synthetic gear oil and have had no problems. Again, you can see that this was 10 months ago. Others have switched to synthetic gear oil too, including cos.
 

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Whish I had the money to go with the Amsoil, but I had the Mobil one laying around from one of my trucks... What kind of intervals you guys going to do? 50,000? BTW- this thing is so smooth...like butta...should have been that way from factory and does it roll freely...just my thought..
 

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Discussion Starter · #19 ·
[quote author=azfusion link=topic=81093.msg2271711#msg2271711 date=1209437125]
Whish I had the money to go with the Amsoil, but I had the Mobil one laying around from one of my trucks... What kind of intervals you guys going to do? 50,000? BTW- this thing is so smooth...like butta...should have been that way from factory and does it roll freely...just my thought..
[/quote]

I'll probably go 30K on the drains. 50K should be fine too.
 

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Redline or Amsoil. Ya just need to decide which one or what combination. I went with 2 qts Redline MT-90 and one qt MTL and love the shifting - hot or cold it's great. :)
 
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