Jetboy47 Posted July 7 Report Share Posted July 7 Can I please get the correct PTU and RDU fluid type for my 2023 ST. I haven't been able to find them in the owners manual. I've seen different varying types on You-tube videos and and I just want to be clear what are the Ford recommended ones for my particular vehicle. I'd like to know the exact fluids and then maybe get the Amsoil equivalent, or another type if anyone believes there is something better than the Ford recommended type for the PTU, RDU, Transmission & engine oil. 2 Quote Link to comment Share on other sites More sharing options...
Wubster100 Posted July 8 Report Share Posted July 8 (edited) RDU: Motorcraft SAE 75W Disconnect RDU Fluid XY-75W-QL PTU: Motorcraft SAE 75W-85 Premium Synthetic Rear Axle Fluid XY-75W85-QL / WSS-M2C942-A ATF: Motorcraft MERCON ULV Automatic Transmission Fluid XT-12-QULV / WSS-M2C949-A / MERCON ULV Edited July 8 by Wubster100 1 1 Quote Link to comment Share on other sites More sharing options...
STBEAST Posted July 8 Report Share Posted July 8 Wubster100 thank you for the info. I too could not find that in my digital owner's handbook. I did see on some previous threads that there are some possibly better alternatives via Redline or Amsoil. One of the popular ones was Redline Shockproof for the PTU? 1 Quote Link to comment Share on other sites More sharing options...
Jetboy47 Posted July 8 Author Report Share Posted July 8 Thanks Wubster100, much appreciated. I just ordered the Motorcraft RDU fluid. If anyone has any alternative recommendations for the PTU and Transmission fluids I love to hear. 1 Quote Link to comment Share on other sites More sharing options...
fishx65 Posted July 11 Report Share Posted July 11 On 7/7/2025 at 10:07 PM, Wubster100 said: RDU: Motorcraft SAE 75W Disconnect RDU Fluid XY-75W-QL PTU: Motorcraft SAE 75W-85 Premium Synthetic Rear Axle Fluid XY-75W85-QL / WSS-M2C942-A ATF: Motorcraft MERCON ULV Automatic Transmission Fluid XT-12-QULV / WSS-M2C949-A / MERCON ULV Would you happen to know of a 2022 St-Line's RDU also takes 75W? 1 Quote Link to comment Share on other sites More sharing options...
Wubster100 Posted July 11 Report Share Posted July 11 On 7/7/2025 at 10:07 PM, Wubster100 said: RDU: Motorcraft SAE 75W Disconnect RDU Fluid XY-75W-QL PTU: Motorcraft SAE 75W-85 Premium Synthetic Rear Axle Fluid XY-75W85-QL / WSS-M2C942-A ATF: Motorcraft MERCON ULV Automatic Transmission Fluid XT-12-QULV / WSS-M2C949-A / MERCON ULV This is for all trim levels 2019-2024. Some vehicles are equipped with a PTU cooler. 1 Quote Link to comment Share on other sites More sharing options...
fishx65 Posted July 11 Report Share Posted July 11 6 minutes ago, Wubster100 said: This is for all trim levels 2019-2024. Some vehicles are equipped with a PTU cooler. Thanks Wub, just ordered me a quart from Amazon. 1 Quote Link to comment Share on other sites More sharing options...
Samurai Edge Posted 12 hours ago Report Share Posted 12 hours ago On 7/8/2025 at 12:39 PM, Jetboy47 said: Thanks Wubster100, much appreciated. I just ordered the Motorcraft RDU fluid. If anyone has any alternative recommendations for the PTU and Transmission fluids I love to hear. Redline has a full synthetic 75W85 gear oil. Motul has a full synthetic 75W90 gear oil. Either would be fine for an alternative to the PTU. Redline has a MT-LV 70W/75W gear oil that would be an alternative to the Motorcraft 75W. That is per Redline Tech Services for the RDU for the Edge ST. Motul has a ATF VI transmission fluid for the Edge ST. However, You can get the Motorcraft product for less on Amazon than the Motul. I only use top brand name products, but that's me 1 Quote Link to comment Share on other sites More sharing options...
Biker Posted 6 hours ago Report Share Posted 6 hours ago The price of the Ford RDU fluid at the dealer is ridiculous. I thought the ULV was bad til I bought the RDU fluid... 1 Quote Link to comment Share on other sites More sharing options...
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