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D6202-02 – Standard Test Method Technical Guide
📐 Test Method Overview and Scope
This test method, designated ASTM D6202-02, is an American National Standard that covers the measurement of automotive engine oils on the fuel economy of passenger cars and light-duty trucks. The tests are conducted using a specified 4.6-L spark-ignition engine on a dynamometer test stand. It applies to multiviscosity grade oils used in these applications. Values are stated in SI units or other units, each system to be used independently.
Companion test methods used to evaluate engine oil performance for specification requirements are discussed in the latest revision of Specification D 4485.
| 🟦 Parameter | 📏 Specification |
|---|---|
| Engine Type | 4.6-L Spark-Ignition |
| Max Vehicle Weight | 3856 kg (8500 lb) |
| Oil Grade | Multiviscosity |
The ASTM Test Monitoring Center (TMC) provides reference oils and assessment of test results. Laboratories can use TMC services to ensure results are statistically similar to other laboratories, and some agencies require this for oil qualification.
⚙️ Test Equipment and Procedure
The test method includes detailed apparatus requirements such as engine cooling system, external oil system, fuel system, engine intake air supply, and exhaust back pressure systems. The test engine configuration is specified, and laboratory ambient conditions are controlled. Engine speed and load control are essential for accurate fuel economy measurements.
The procedure is arranged with sections covering Introduction, Scope, Referenced Documents, Terminology, Summary of Test Method, Significance and Use, and Apparatus.
| 🎯 Section | ⚡ Subject |
|---|---|
| 1 | Scope |
| 2 | Referenced Documents |
| 3 | Terminology |
| 4 | Summary of Test Method |
| 5 | Significance and Use |
| 6 | Apparatus |
Users must establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. This standard does not address all safety concerns.
📊 Key Measured Properties
The primary property measured is the fuel economy effect of engine oils under controlled conditions. The test method evaluates oil performance for specification requirements in passenger cars and light-duty trucks. The results are critical for determining fuel-saving capabilities of multiviscosity grade oils.
Companion test methods in Specification D 4485 provide additional evaluation for engine oil performance.
❓ Frequently Asked Questions
🔍 What is the main purpose of ASTM D6202-02?
To measure the effects of automotive engine oils on the fuel economy of passenger cars and light-duty trucks using a specified 4.6-L spark-ignition engine.
💡 What engine is used in the test?
A specified 4.6-L spark-ignition engine mounted on a dynamometer test stand.
⚡ How does the TMC support this test method?
The TMC provides reference oils and assessment of test results to ensure laboratories produce consistent and comparable results, and some agencies mandate its use for oil qualification.
📌 What is the vehicle weight limit?
The test covers vehicles up to 3856 kg (8500 lb) gross vehicle weight.