interval Archives - UnderhoodService
VIDEO: Guess The Spark Plug Replacement Interval

Are you a master of spark plug intervals? This challenge will prove it. This video is sponsored by Autolite.

Why Oil Filters Matter To Extended Oil Change Intervals

With oil life indicators pushing the average oil change past the 6,000-mile mark, it is not just the quality of the oil that’s improved, it is the quality of the filter, as well. Neglected oil change intervals can ruin the best engine oils and filters. As engine oil and the filter accumulate miles, they become contaminated with carbon, water and various acids, all of which are a byproduct of internal combustion that will form a film of black, gooey sludge on the interior parts of the engine.

Replacement of the oil filter. New and old dirty filter