GMW GMW17766 PDF

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose/Material Description.

This document provides standard technical requirements for the GM aftermarket Diesel Fuel Conditioner Additive which is a multifunctional middle distillate fuel additive package that provides enhanced lubricity, corrosion protection, keeps engine & fuel injectors clean, enhances stability, and provides cetane boost. It is specifically formulated for low sulfur and ultra-low sulfur applications including biodiesel blends up to B20 (20% biodiesel blends).

Note: The additives shall not contain any metallic content or methanol.

Symbols.

Not applicable.

Applicability.

The additives can be used in all GM diesel engine applications including in-direct fuel injection systems and modern common rail fuel injection systems.

This Diesel Fuel Conditioner is expected to provide following benefits:

• Improves fuel lubricity thereby preventing fuel pump failures.

• Prevents fuel system corrosion due to contamination of water or other corrosive compounds in the fuel.

• Keep injector and engine clean to maintain power, performance, and fuel cleanliness.

• Increase cetane number for better engine performance.

• Improves thermal and storage stability, thereby reducing fuel oxidation and sludge formation that can plug fuel filters, cause deposits, and damage to fuel injectors.

• Prevents fuel system corrosion due to contamination of water or other corrosive compounds in the fuel.

• Have water separating demulsifier agents to help provide dry fuel.

The diesel fuel conditioner is expected to provide protection against following types of fuel system deposits:

a. Deposits produced by diesel fuel degradation

b. Deposits produced by oxidation of biodiesel fuels

c. Polymeric organic deposits related to specific additive chemistries

d. Alkali metal carboxylates deposits related to interactions of specific fuel additives with fuel contaminants

As such, the diesel fuel conditioner is envisioned to be used on a regular basis by addition to the fuel tank during fuel fills in order to protect the diesel engines and fuel systems and ensure the integrity of their design and performance.

The tests defined in 3.1 through 3.11, should be regarded as minimum requirements for compliance for diesel fuel conditioner additives. Additional requirements may be defined based on the type of additive, its specific chemistry, and cleaning application. This specification applies to diesel and biodiesel blended fuels only.

Remarks.

Program specific technical specifications may include additional requirements that are not referenced in this document and may supercede any requirements included in this document. In case of any conflicts between this document and the program specific technical specifications, the program specific technical specifications shall take precedence.

This specification describes the technical requirements for GM aftermarket diesel fuel detergent packages. The GM Global Propulsion Systems (GPS) Fuels Group will evaluate the technical merits of the additive package prior to being considered by GM Purchasing for the Customer Care and Aftersales Division. These specifications will cover requirements for performance as well as requirements for ensuring compatibility of the additives with fuel system, engine, and the after-treatment catalyst system. The requirements are a combination of standardized fuel industry engine dynamometer cleanliness tests, chemical laboratory tests, and supplier specific vehicle performance demonstration tests, as a basis for consistent fuel additives performance evaluation.