changed the differential gear oil

[YONGSEOK KIM]

Hello everyone! I’m a Mustang GT owner from South Korea.

I bought my car new and have driven about 4,500 km (2,800 miles) so far. I recently changed the differential gear oil for the first time.

Ford recommends using Motorcraft XL-13 friction modifier for the LSD. However, this time I used Moty’s M502 differential gear oil from Japan.

According to Moty’s, M502 already contains friction modifiers and is suitable for LSD applications, so I decided not to add any additional XL-13.

I can’t say the difference after the oil change was dramatic, but the drivetrain does seem to feel slightly smoother and more refined when transferring power.

I’m curious — what differential gear oil are you guys using in your Mustang GTs?

I really enjoy trying different oils and doing little experiments with my car, so if you recommend something that I can actually get here in South Korea, I’d be happy to give it a try! Haha.

Thanks in advance for your recommendations!

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[SR5BART]

I have this ready to go when the time comes

 

[YONGSEOK KIM]

I have this ready to go when the time comes

I might have to try this one for my next differential oil change
Thanks bro!

 

[Neggytive]

are you racing the car?

The gear lube is god for a lot of miles otherwise

 

[Jon26GT]

i did mine at 1000miles and switched to redline. it also already had the friction modifier so no other fluid was needed. I like getting the first fluids out early to get all the break in junk out. I also just did my mt82 with the BG syncro shift cocktail at 2800miles

 

[krisk]

If you have the Torsen differential, then friction modifier is not required. It quiets down the differential, but does not help with how the differential functions. I am using Red Line 75W140NS, which is the version without friction modifier. I run the higher weight oil and no friction modifier because my car is a track vehicle, so I don’t care about the noise and I want a heavier oil.

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