I don’t think it’s mandated anywhere. But since it’s so easy and cheap to do everyone does it.
I’ve heard some have gotten a decent amount of sludge out of it.
Im doing mine in a few weeks before I bring mine out of hibernation. My car has 1700 miles.
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2016 Challenger Hellcat /B5 blue/Sepia interior/Brass Monkey Wheels/
2018 ZL1 1LE/Red hot
2019 Shellby GT 350R/ Oxford white/ Matte Black Stripes/ Carbon Fiber Dash/ Electronics Package #413
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