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Switch to 20W-50 when ambient temperatures are consistently above freezing
Three screws out
advanced Molybdenum formulation — higher temperature protection than 10W-30
Includes a replacement steel pin for straightforward installation
Detergent/dispersant additives keep fuel injectors clean
Main Fuse Box Cover mount Switch to 20W-50 when ambientThe factory main fuse box cover cracks, fades, and disappears. Mazda discontinued the original (FD31 66 761). A cracked or missing cover is one of those details that announces neglect in an otherwise clean engine bay. This is a direct replacement. Printed in black ASA the correct material for anything that lives under the hood. Heat resistant, UV stable, and dimensionally accurate to the OEM fuse box it mounts on (FD31 66 761). Available Versions
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