Oxidation/rust of engine parts in 2017 Yaris

[06YarisRS]

Originally Posted by dogsridewith

Could steering noise be rubber creaking...maybe at the ball joint cover or something at the top of the strut? I'm pretty sure my Corrosion Block spritzing made some suspension creak go away, and now I'm hitting everything rubber or plastic (white sway bar bushings). Just my experiment...not advice.

Are you not worried about the potentially adverse reactions between rubber/plastic components and a petroleum based product? It probably wouldn't hurt anything in the short term, but long term exposure could cause crumbling, swelling, distortion of bushings/other rubber parts etc. I've definitely seem that happen and have caused it myself before I became attuned to it and now try to avoid direct contact.