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The American Petroleum Institute (API) has released the latest edition of the

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motor oil guide. This edition follows the first licensing of ILSAC GF-7 motor oils. It marks a major step forward in passenger engine oil technology.

The guide serves consumers, technicians and other professionals. It remains a trusted resource for choosing oils that meet manufacturer and industry specifications.

GF-7A and GF-7B Lead the New Motor Oil Guide Update

The updated motor oil guide is available for download. It provides in-depth details on both current and previous oil standards.

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, launched in March 2025, bring several performance improvements. These include better protection against low-speed pre-ignition (LSPI) and higher fuel economy. They also enhance performance at high temperatures and protect against timing chain wear.

These upgrades help engines stay cleaner and more efficient, even when using fuels up to E85.

API SQ Specification Supports Broader Compatibility

API’s SQ specification (without Resource Conserving) outlines new performance requirements. These apply to oils compatible with earlier API S categories.

These categories cover a range of viscosity grades. They include heavier oils and ultra-low viscosity grades like SAE 0W-8 and 0W-12. These oils are suitable for modern engines.

Certification Marks Identify GF-7 Compliant Oils

The motor oil guide explains the two API Certification Marks. These are the “Starburst” and the “Shield.”

The “Starburst” appears on oils that meet GF-7A standards. The “Shield” applies only to SAE 0W-16 oils certified under GF-7B.

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