Ford FLTM BO 101-05 Fuel Resistance Determination of Plastic Parts

The “Ford FLTM BO 101-05 Fuel Resistance Determination of Plastic Parts” standard, developed by Ford Motor Company (Ford), describes a test method for evaluating the fuel resistance of plastic automotive components, particularly colored or painted exterior plastic parts such as bumpers, dashboards, moldings, and trim. This method assesses how these materials withstand accidental exposure to automotive fuels under high-temperature conditions.

Modern vehicles contain numerous plastic components that must maintain their appearance and structural integrity throughout their service life. Fuel spills during refueling, exposure to fuel vapors, or accidental contact with gasoline can cause discoloration, swelling, softening, cracking, or coating damage if the materials are not sufficiently durable. This standard provides a standardized procedure to verify that plastic parts meet durability requirements prior to manufacturing approval.

The primary purpose of the Ford FLTM BO 101-05 standard is to define the following:

• Resistance of plastic surfaces to fuel exposure.
• Resistance of painted or coated surfaces to gasoline contact.
• Dimensional stability after fuel exposure
• Color and gloss retention.
• Resistance to softening, swelling, blistering, or cracking.
• Maintaining the overall appearance after exposure to automotive fuels.

This standard is specifically designed for the following:

• Painted plastic bumpers
• Exterior trim components
• Plastic body panels
• Molded decorative parts
• Colored polymer components exposed to external environments.

The procedure specifically focused on evaluating performance under high ambient temperature conditions, which can accelerate fuel-related degradation mechanisms.

This method essentially follows these steps:

• Preparation of representative plastic samples.
• Applying or exposing a test surface to a specific fuel.
• High-temperature conditioning.
• Removal of fuel residue after exposure time.
• Visual and physical evaluation of the sample.

The evaluation criteria are as follows:

• Surface staining
• color change
• Loss of brightness
• Swelling
• Cracking
• Paint blistering
• Layer separation
• Surface softening

The results are then compared against Ford's acceptance criteria to determine eligibility.

The Ford FLTM BO 101-05 standard is applicable to the following materials:

• Polypropylene (PP)
• Thermoplastic olefin (TPO)
• Acrylonitrile butadiene styrene (ABS)
• PC/ABS blends
• Polycarbonate
• Polyamide (nylon)
• Painted plastic parts
• Polymers with decorative coatings

These materials are widely used in modern vehicle exterior applications where fuel contact is possible.

Fuel resistance is a critical performance requirement because gasoline contains solvents that can attack many polymer and coating systems. Insufficient resistance can lead to:

• Cosmetic damage visible to the customer.
• Premature aging
• Paint defect
• Warranty claims
• Reduced vehicle appearance quality.
• Rising spare parts costs

The Ford FLTM BO 101-05 standard helps ensure that vehicle components remain attractive and functional throughout their lifespan by qualifying materials.

This standard is generally used in the following situations:

• Material selection
• Supplier qualification
• Product validation tests
• Engineering certification programs
• Production quality control checks
• Coating system development

It serves as a benchmark for evaluating new plastic formulations and paint systems designed for automotive exterior applications.

The Ford FLTM BO 101-05 standard is important because it ensures that plastic parts used in vehicles can withstand accidental contact with gasoline and other automotive fuels without unacceptable damage. This standard is considered necessary for the following reasons:

• It preserves the vehicle's appearance: Modern vehicles include many painted and molded plastic parts, such as:
  • Tampons
  • Front panels
  • Side body strips
  • Fuel filler cap frames
  • Exterior trim pieces

Fuel spills during refueling can damage these surfaces. This standard verifies that the materials retain their color, gloss, surface texture, and overall appearance characteristics for the life of the vehicle.

• Prevents material degradation: Gasoline contains strong hydrocarbons and solvents that can damage plastics and coatings. Materials lacking sufficient fuel resistance may exhibit the following:
  • Swelling
  • Softening
  • Cracking
  • blistering
  • Layer separation
  • Surface wear

This standard identifies materials vulnerable to these failures before they even reach the production stage.

• It improves durability in real-world conditions: Vehicle components are typically exposed to the following:
  • Fuel splashes during refueling
  • Fuel vapor
  • High summer temperatures
  • Repeated environmental aging

The testing method simulates these conditions and helps ensure long-term durability in actual customer use.

• Reduces warranty costs: Fuel-related damage can lead to:
  • Customer complaints
  • Cosmetic flaws
  • Part replacements
  • Repainting costs
  • Warranty claims

By requiring materials to pass these tests, Ford minimizes the risk of field failures and associated costs.

• Coating system performance is ensured: Many exterior plastic parts are painted or coated. Fuel contact can cause paint peeling, loss of adhesion, surface staining, and reduced gloss. This standard verifies that coating systems remain firmly adhered and visually acceptable after fuel contact.
• It supports material selection: Engineers use this standard to make comparisons in the following areas:
  • Different plastic formulations
  • Paint technologies
  • Surface treatments
  • Supplier materials

This allows Ford to select materials that provide the best combination of durability and appearance.

• It protects customer satisfaction: Customers expect a vehicle's exterior to remain attractive even after years of use. Visible fuel damage near the fuel filler area or on painted trim can negatively impact perceived quality. This standard helps ensure the following:
  • Better preservation of the vehicle's appearance.
  • Higher perceived quality
  • Improved customer satisfaction
• It standardizes supplier qualification: This standard provides a consistent testing procedure for all suppliers. This ensures:
  • The materials are evaluated under the same conditions.
  • The results are comparable among suppliers.
  • Quality requirements are met consistently worldwide.

In conclusion, the Ford FLTM BO 101-05 standard is a crucial material validation standard that measures the resistance of plastic automotive components to damage from fuel exposure. By evaluating painted and colored plastic parts under high-temperature conditions, this standard helps ensure long-term durability, appearance preservation, and customer satisfaction. This standard plays a vital role in Ford's material qualification process and supports the development of fuel-resistant exterior vehicle components.

For many years, our organization, with its competent and experienced staff, has been understanding the needs of its customers, providing the advanced testing services they require, and assisting them in the establishment, implementation, and improvement of management systems. Within this framework, we also provide testing services to businesses in accordance with the Ford FLTM BO 101-05 standard.