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I've been using the oem fluid all the time. It is very cheap.
But next time I will use a quality fluid like Amsoil.
Since you own a 2021 model, you have a gen2 10l90 with couple of small changes.
I read that the newer 10l90 use better friction materials and even the valve body is different. Smoother shifts with better software in terms of adaptive learning as well.
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Callaway SC750 ZL1, DIY 1LE with added OEM 1LE Wheels, DSSV Suspension and 1LE Aero, FEA front control arms, DIY oil cooler, CWA 150 pump, bigger intercooler, BMR lockout kit, CTSV Brake Air Deflectors, Smooth idle cam, LS7 lifters, CHE trunnion bushings. Tuned by JRE
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