Quote:
Originally Posted by CalgaryZL1
Dot3 absorbs less moisture so I’m guessing no on dot4 from the factory. GM does not want to be like Ferrari were they demand a $10,000 service every year. Besides probably listed on the fill cap.
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Understood about the DOT3 absorbing less water. That's easy knowledge to find anywhere on the internet.
I looked it up but it seems that maybe around 2021 GM started putting DOT4 in the ZL1. They also have put it in the C8 so....I highly doubt they are going to charge $10k for a brake fluid servicing. Probably a couple hundred $$$ but I don't think the factory DOT4 is anywhere as good as RBF600 or Castrol SRF.