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Originally Posted by tomjonesBT33
Picked up a Z4 M roadster at the beginning of Dec. Prior owner had done a good bit of work to get it running and driving like new. PO said that he changed all the fluids, but I have a hard time believing the trans fluid was changed. See pic of the oil I removed today. Replaced the oil with Red Line MTL. Haven't been able to drive it yet, but just rowing the gears while in the garage, I can tell it's shifting much smoother.
MTL is 75W80, but seems thin like ATF. We'll see how it does. May switch to MOTUL 75W90 as I'd like a little thicker oil in the gearbox.
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5 years ago I bought a CPO Wrangler from a popular Jeep dealer. Upon final inspection of the car I noticed that the brake fluid was still dark. The dealer acknowledged that they don't change "all the fluids" when they state "change fluids" in the CPO work list. Seems what constitutes "fluids" is up to interpretation in the Automobile sales profession.