The current and previous API Service Categories are summarized in convenient charts. Vehicle owners should refer to their owner's manuals before consulting these charts.

API API Engine Oil Service Category Charts Gasoline Engines ... Diesel F Category ... Diesel C Categories ... You can download these charts in PDF format from API's website.

Discover the complete Engine Oil Classification Chart with SAE, API, ACEA, ILSAC, and JASO standards to choose the best oil for your vehicle.

Here are some API standards for engine oil: API SP: Introduced in May 2020, this standard protects against low-speed pre-ignition (LSPI), timing chain wear, and high temperature deposits.

Explore the distinctions between API Base Oil Groups I, II, and III—saturates content, sulfur levels, viscosity index, and refining processes—through a detailed comparison table and analysis of …

Jan 10, 2026 · We’re going to give you a complete explanation of API oil service categories, breaking down those cryptic letters and symbols into plain English. You’ll learn exactly what they mean for …

Explore the key specifications of API oil standards, their classifications, and how they impact engine performance and longevity in different conditions.

An overview of US API, European and Japanese classifications for diesel engine lubricating oils [DieselNet Technology Guide].

Passenger Vehicle Engine Oil Requirements For API SM and ILSAC GF-4 Categories ... Passenger Vehicle Engine Oil Requirements For API SJ and SL Categories ... Commercial Vehicle Engine Oil …

Discover the ultimate Engine Oil Specification Chart to choose the right oil for your vehicle. Learn about viscosity, API, ACEA, ILSAC ratings, and OEM approvals.