Transmission fluid question
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Cruising
Joined: May 2025
Posts: 11
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Transmission fluid question
Just wondering, has anyone used Motul High-Torque DCTF 110440 fluid? Is it the right type to use in the C8 or should I stick to the AC Delco fluid that I see people use on StupidTube? The Motul is $19.50/quart compared to $26/quart for the AC Delco on Summit Racing website.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,045
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From: NE South Carolina
Just wondering, has anyone used Motul High-Torque DCTF 110440 fluid? Is it the right type to use in the C8 or should I stick to the AC Delco fluid that I see people use on StupidTube? The Motul is $19.50/quart compared to $26/quart for the AC Delco on Summit Racing website.
My dealer only charged me $30/Liter and Tech did a flush 1st when he also changed the DCT filter (which was needed at ~8000 miles.) I took advantage of GM's free offer year 1 with ~3000 miles (mostly to get a Flush) but still required another from 7000 to 8000 miles!
Yep for the E-Ray when I need to have fluid replaced, I'll let the dealer make some profit on the fluid rather than buy from another retailer who is also making a profit. Yep I buy from Summit and Jegs, they have good free Tech Support. BUT they don't maintain a repair facility with a Trained C8 Tech!
PS: If the dealer treats you right and provides a discount I think it is only fair to pay them a profit on the fluid IF you are having them install. I fell it's like going to a restaurant and bringing your own bear because Walmart is willing to sell at a lower profit margin. I have no problem however asking for a discount! In my case not needed at the great Chevy dealer I use. But when buying parts at the BMW dealer I do. For Chevy parts that I am installing usually buy from discount Internet source.
Last edited by JerryU; May 20, 2025 at 08:36 AM.
Race Director
Joined: Sep 2016
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Well, it says it replaces just about every fluid out there, including FFL-4. But it would concern me a bit that it claims to work in everything, when we know there are different fluids intended for different types of DCTs. Use at your own risk.
My take: You spent what, $80K on a car? And you're going to worry about a $60 difference in fluid cost every three years for a DCT that costs ~ $15K to replace? Ben Franklin had a comment for that.
My take: You spent what, $80K on a car? And you're going to worry about a $60 difference in fluid cost every three years for a DCT that costs ~ $15K to replace? Ben Franklin had a comment for that.
Melting Slicks
Joined: Jun 2001
Posts: 2,266
Likes: 550
For me it is the best performing fluid. That is why I was looking at 888705 Valvoline. GM waffles on dct filters change intervals and look at the GM pickup debacle with their viscosity pivot to the thicker oil. Just my thoughts.
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3rd Gear
Joined: May 2025
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I’ve looked into Motul High-Torque DCTF (110440) before—great specs on paper, especially for high-heat, high-torque applications. But for the C8, I'd still recommend sticking with the AC Delco DCT fluid unless you're tracking heavily and know exactly what you're gaining. GM tuned that transmission specifically for their fluid's properties, and even slight viscosity or friction differences could impact shift behavior or long-term durability. The cost difference is tempting, but with something as critical as the DCT, OEM might be the safer bet.
Drifting
Joined: Mar 2017
Posts: 1,930
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From: Columbus OH
The question to ask is does the Motul High-Torque DCTF (110440) have the antifoaming additive? That's what breaks down after three years and requires changing the transmission every three even if the mileage spec is not reached.
3rd Gear
Joined: May 2025
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I've looked into Motul High-Torque DCTF 110440 before—it's a solid fluid and meets the performance spec for a lot of high-load dual-clutch systems. That said, for the C8’s Tremec 8-speed DCT, GM specifically formulated the AC Delco DCT fluid (part #10-4159) to match the clutch behavior and thermal characteristics of the C8 drivetrain.
While the Motul might work fine in theory, I’d personally stick with the AC Delco unless there's confirmation from someone who has logged serious miles with the Motul in a C8. The transmission tuning on these cars is pretty sensitive, and saving a few bucks per quart isn’t worth potential issues later.
Curious if anyone here has actually run the Motul long-term in a C8?
While the Motul might work fine in theory, I’d personally stick with the AC Delco unless there's confirmation from someone who has logged serious miles with the Motul in a C8. The transmission tuning on these cars is pretty sensitive, and saving a few bucks per quart isn’t worth potential issues later.
Curious if anyone here has actually run the Motul long-term in a C8?
Race Director
Joined: Mar 2010
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According to the owner's manual, it is recommended to use the Dexron ULV Automatic Transmission Fluid for optimal performance in your C8. You can view the ACDelco product at: https://parts.gmparts.com/product/ac...-1-qt-19352619. Here, you can also locate GM dealerships and parts retailers in your area that has it in stock.
Race Director
Joined: Aug 2016
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From: Garden Valley CA
According to the owner's manual, it is recommended to use the Dexron ULV Automatic Transmission Fluid for optimal performance in your C8. You can view the ACDelco product at: https://parts.gmparts.com/product/ac...-1-qt-19352619. Here, you can also locate GM dealerships and parts retailers in your area that has it in stock.
Navigator
Joined: May 2025
Posts: 9
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Yeah, I’ve seen a few folks run the Motul High-Torque DCTF without issues, but personally, I’d stick with the AC Delco fluid unless you’re 100% sure the specs match. GM designed that trans for their own fluid, and saving a few bucks might not be worth the risk long-term. Just my 2 cents.
Melting Slicks
Joined: Sep 2020
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From: Kelso, Wa
According to the owner's manual, it is recommended to use the Dexron ULV Automatic Transmission Fluid for optimal performance in your C8. You can view the ACDelco product at: https://parts.gmparts.com/product/ac...-1-qt-19352619. Here, you can also locate GM dealerships and parts retailers in your area that has it in stock.
They won't even put it in writing in the "book".
I just checked the link. It asks for year, make model, etc and says that this " Fits 2012 Chevrolet Corvette Coupe, Stingray, RWD 6.2L V8 G"
Race Director
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What waffling? They've clarified the importance of the 7500 mile filter change, but that was always the requirement. And in spite of how some people interpreted the OM (and I agree GM's wording was poor), the second change has always been at 22.5K.