The cetane rating is a measure of the ignition quality of diesel fuel. It indicates how quickly and efficiently the fuel ignites in a diesel engine. A higher cetane rating means the fuel ignites more readily, leading to smoother combustion and reduced engine noise. The cetane rating is determined using specific test methods established by the American Society for Testing and Materials (ASTM).
The cetane rating is relevant in the context of petroleum marketing and fuel regulations. It is used to ensure that diesel fuels meet certain quality standards, which can affect vehicle performance and emissions. Legal practices surrounding cetane ratings may involve compliance with state and federal regulations regarding fuel quality, and users may need to fill out specific forms or reports to demonstrate compliance.
Here are a couple of examples of abatement:
For instance, a diesel fuel with a cetane rating of 40 may ignite slower than one with a rating of 55, affecting engine performance and emissions. This difference can lead to variations in fuel efficiency and engine wear over time.
According to 15 USCS § 2821, the definition and standards for cetane ratings are established to ensure quality in diesel fuels. This statute outlines the importance of adhering to ASTM test methods for measuring cetane ratings.
Examples of state differences (not exhaustive):
| State | Cetane Rating Requirements |
|---|---|
| California | Requires a minimum cetane rating of 53 for diesel fuel. |
| Texas | No specific state minimum, but must comply with federal standards. |
| New York | Recommends a cetane rating of at least 40 for diesel used in vehicles. |
This is not a complete list. State laws vary, and users should consult local rules for specific guidance.
| Term | Definition |
|---|---|
| Cetane Number | A specific measure of the ignition quality of diesel fuel, determined by ASTM D613. |
| Cetane Index | A calculated value that estimates the cetane number based on the fuel's density and distillation range (ASTM D976). |
If you are a diesel fuel supplier or user, ensure that your fuel meets the required cetane rating for your state and intended use. You can explore US Legal Forms for templates and resources to help you comply with fuel quality regulations. If you face complex issues regarding fuel standards, consider consulting a legal professional for tailored advice.
Browse our library of 85,000+ state-specific legal templates.
A cetane rating of 40 or higher is generally considered acceptable, while ratings above 50 are preferred for optimal performance.