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AV-SCANNER / Service function guides / Engine and oil
This engine oil selection guide walks you through the complete process of reading viscosity grades and service specifications so you can choose the correct oil for any vehicle you service. It is written for both DIY motorists and working mechanics who want a repeatable, professional method rather than guesswork. You will learn how the oil system works, when selection matters, how to prepare, and the full step-by-step procedure from verifying the owner's manual to confirming the fill. By the end you will be able to interpret any oil label, cross-check it against factory requirements, and avoid the costly mistakes that come from choosing the wrong lubricant.
Guidance is general and covers many makes. Exact procedures and values vary by model, so confirm them in the factory service information for your vehicle.
Download all 12 sections as a branded PDF to use in the workshop.
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