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Anyone out there have access to GM’s specification for the FFL-4 DCT transmission fluid??
The reason is that I have read that the FUCHS Titan (used to be Pentosin) FFL-4 is the same but need access to the actual specification to make sure its really the same product.
GM / AC Delco FFL-4 costs me $60 litre from the dealer here in Australia, I can buy the FUCHS Titan FFL-4 for $20 litre.
Anyone out there have access to GM’s specification for the FFL-4 DCT transmission fluid??
The reason is that I have read that the FUCHS Titan (used to be Pentosin) FFL-4 is the same but need access to the actual specification to make sure its really the same product.
GM / AC Delco FFL-4 costs me $60 litre from the dealer here in Australia, I can buy the FUCHS Titan FFL-4 for $20 litre.
I don't have the spec. But the version of the 2020 Service Manual I have says
"Fuchs TITAN EG FFL-4 TREMEC transmission fluid". Note the EG in the name, and the TREMEC in the name. Details like that may suggest it is not the same. Also from the attached TREMEC flyer, it also says:
"FUCHS Titan EG FFL-4 Double Clutch Transmission Fluid for TREMEC", again with the EG in the name and "for TREMEC". I would not assume that Fuchs Titan FFL-4 (without the EG) is the same fluid.
Edit: It was later established, that EG is just a term meaning factory fill - the product is the same with or without the EG indicated. The factory fill is not necessarily for all applications. It was originally developed for Getrag/BMW, and has a Gertrag approval - factory fill probably refers to whatever vehicle(s) it was originally developed for. It may or may not be the factory fill for a C8.
Last edited by Andybump; Apr 13, 2025 at 11:04 AM.
Thank you RKCRLR for the link. I will double check with FUCHS Australia next week. I want to be absolutely sure the right product is being used.
If you happen to find someone knowlegable it would be interesting to find out what "EG" means/meant and if it is just a matter of renaming. I wouldn't be surprised if Fuchs supplies the AC Delco FFL4 fluid.
Yes I will check it out. Im assuming the EG is a derivative of the FFL-4 maybe containing something that GM have specified for the C8 specifically. If I can establish the difference Ill let you know
If you happen to find someone knowledgeable it would be interesting to find out what "EG" means/meant and if it is just a matter of renaming. I wouldn't be surprised if Fuchs supplies the AC Delco FFL4 fluid.
That's probably the case, since the early documentation including some versions of the Service Manual require the Fuchs Titan EG FFL-4 TREMEC fluid only. With motor oil they sometimes say "or equivalent" but not this time. But, what if the don't make it. I'm just wondering, even if Fuchs recommends it (as you found) that's not the same as GM approving it unless its exactly the same formula they supply for the GM brand. With motor oil, the manual requires that we use GM dexos 2 or dexos R approved oil. Is there a process by which GM approves alternative DCT fluids for use in the C8?
I agree about asking what EG means- I would question them about the exact name - having noted that very similar sounding motors oils (Mobil 1 ESP, Mobile 1 ESP Formula, and Mobil 1 ESP x3) are each a different motor oil formula. The use of the word EG and TREMEC when listing the required fluid may be significant.
If you happen to find someone knowlegable it would be interesting to find out what "EG" means/meant and if it is just a matter of renaming. I wouldn't be surprised if Fuchs supplies the AC Delco FFL4 fluid.
The AC Delco fluid is Fuchs Titan EG FFL4.
The AC Delco fluid does have different properties than the regular FFL4 so it's not identical...
.... though it may very well be interchangeable just like people use Amsoil or FFL Racing DCT fluid.
Thanks again for your input. Can you confirm that the C8 Service Manual actually says to use “Fuchs Titan EG FFL-4 TREMEC fluid only”?
I do not have access to a C8 Technical Service Manual here in Australia.
And, the version of the Service Manual that I have says that as well - I have a 2020 version that was obtained from ebay. I also believe that it would have been changed over to read the Delco FFL-4. And I also posted above a flyer from Tremec that says the Fuch Titan FFL-4 TREMEC - again I think it was an early (2020) flyer. We know that the current recommendation is the Delco version. Interestingly, the version of the 2023 Owners Manual (third printing) does not list the fluid name. It says - see your dealer. The Australian version may be different. Is there a dealer near you that has the correct fluid?
Yes the dealers have the correct GM/AC Delco FFL-4, @ $62 per litre, I bought 2 litres to add for track use. Fuchs FFL-4 is a third of the cost, I trying to keep the cost down for a transmission oil and filter change which will cost me around $1800.00 using dealer supplied product.
Yes the dealers have the correct GM/AC Delco FFL-4, @ $62 per litre, I bought 2 litres to add for track use. Fuchs FFL-4 is a third of the cost, I trying to keep the cost down for a transmission oil and filter change which will cost me around $1800.00 using dealer supplied product.
This product ships to the contiguous 48 United States and Canada only. Can ship by all ground carriers except the United States Postal Service. Cannot ship to APO/FPO addresses.
Received the following response when I asked if the AC/Delco FFL-4 was the same as the Fuchs Titan FFL-4. Not surprising really to know that Fuchs are protecting their OEM customer.
to summarise then I have found that;
*Fuchs Titan EG FFL-4 Double Clutch transmission fluid for Tremec as specified in the 2020 C8 Workshop Manual (subsequently withdrawn from newer versions) is the exact same product as Fuchs Titan FFL-4.
*Fuchs will not confirm that their Titan FFL-4 is exactly the same as the AC/Delco FFL-4 (but we could reasonably assume that it is)
*Fuchs have priced their FFL-4 to provide protection for their OEM customer, (unless it really does cost that much to produce the oil which I doubt), see notes below.
Upon pricing the Fuchs Titan FFL-4 here in Australia I found that the retail price is only $4 per litre cheaper than the AC/Delco FFL-4 so its really a bit of a no brainer, its just not worth the risk of not using the GM product.
Ill be paying $806 for the cost of transmission oil, $340 for a transmission filter and $320 labour shortly when my transmission is due for service. $1466.00!!! Any wonder we want a manual transmission back!
Received the following response when I asked if the AC/Delco FFL-4 was the same as the Fuchs Titan FFL-4. Not surprising really to know that Fuchs are protecting their OEM customer.
to summarise then I have found that;
*Fuchs Titan EG FFL-4 Double Clutch transmission fluid for Tremec as specified in the 2020 C8 Workshop Manual (subsequently withdrawn from newer versions) is the exact same product as Fuchs Titan FFL-4.
*Fuchs will not confirm that their Titan FFL-4 is exactly the same as the AC/Delco FFL-4 (but we could reasonably assume that it is)
*Fuchs have priced their FFL-4 to provide protection for their OEM customer, (unless it really does cost that much to produce the oil which I doubt), see notes below.
Upon pricing the Fuchs Titan FFL-4 here in Australia I found that the retail price is only $4 per litre cheaper than the AC/Delco FFL-4 so its really a bit of a no brainer, its just not worth the risk of not using the GM product.
Ill be paying $806 for the cost of transmission oil, $340 for a transmission filter and $320 labour shortly when my transmission is due for service. $1466.00!!! Any wonder we want a manual transmission back!
The answer doesn't surprise me. I agree, the price savings isn't worth the potential headache, at least while the powertrain is under warranty. But if you connect the dots, the 2020 service manual calls for Titan EG FFL-4 Tremec, Fuchs says the Titan EG FFL-4 Tremec and and the Titan FFL-4 are the same, and the the SDSs for the Titan EG FFL-4 Tremec (EU) and ACDelco FFL-4 (USA) are basically the same and released on the same date. Once out of warranty I wouldn't have a concern with using the Titan FFL-4 fluid. Nor would I have a concern of using the Titan FFL-4 fluid for fluid changes sooner than required as long as I could provide documentation that I used ACDelco fluid at the required intervals.
Transmission Oil Specification
