American Petroleum Institute | API | Oil Categories
If an automotive owner's manual calls for an API SN oil, an API SP oil will provide full protection. For diesel engines, the latest category usually - but not always - includes the performance properties of …
API Engine Oil Lubricant Specifications - oilspecifications.org
API Service Category CK-4 describes oils for use in high-speed four-stroke cycle diesel engines designed to meet 2017 model year on-highway and Tier 4 non-road exhaust emission standards as …
Explanation Of Api Oil Service Categories – Your Ultimate Guide
Dec 26, 2025 · 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 …
Identification of API Service Classification - Public Technical Literature
Below are examples of American Petroleum Institute (API) certification donuts for the most current diesel engine oil categories.
Engine Oil Classification Chart (Complete Guide)
Discover the complete Engine Oil Classification Chart with SAE, API, ACEA, ILSAC, and JASO standards to choose the best oil for your vehicle.
Oil Service Classifications - DieselNet
An overview of US API, European and Japanese classifications for diesel engine lubricating oils [DieselNet Technology Guide].
Understanding Diesel Engine Oil: API Specifications Explained
Jun 5, 2024 · API categories explained: API categories for diesel engine oils follow a simple two-letter format, like CF-4 or CI-4. Here's what each part signifies: First Letter (C): This denotes the oil's …
Requirements For API SN PLUS/SN are the same as RC version, except as per footnotes. 1. LABORATORY/BENCH TESTS. All those that apply, typically SAE 0W-20, 0W-30, 5W-20, 5W-30 …
API CL-4 & FB-4 Diesel Oil Specs Released - MOTOR
1 day ago · API announces CL-4 and FB-4 service symbols for new diesel engine oil specs, supporting improved performance, efficiency, and compliance.
API Oil Specifications and Standards Guide - specsdata.com
Explore the key specifications of API oil standards, their classifications, and how they impact engine performance and longevity in different conditions.