Pete Meier explains how vehicle usage and oil/filter quality should affect your maintenance schedules.

The spoiler here is that Nick and Lem don’t solder much at all, so if you’re not a die-hard crimp aficionado, this might not be your favorite video. They’re pretty different mechanics working on very different items most of the time, but this is an area where the guys are pretty much in lockstep. Here, take a look at the video.
Technician A completed a compression test, noting high readings suggest an exhaust restriction, while Technician B says the test checks volumetric efficiency.
Many high-end scan tools come with a capable digital storage oscilloscope. Time to put that tool to work.
Technician A and Technician B are discussing ways to use fuel trim as a troubleshooting aid. Technician A says that fuel trims that are correcting for a lean condition at high RPM and load conditions indicates a problem in fuel delivery. Technician B says that this condition is caused by a vacuum leak.
Technician A is diagnosing a misfire. He states that a misfire is caused by a fault in the ignition system and that new plugs and coils will repair the problem. Technician B says that a misfire is detected when the ECM detects a variation in crankshaft speed.
Diagnosing the cause of a battery drain can be a challenge today.
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