---
kind: "section"
citation: "42 U.S.C. § 16105"
title: "42"
title_heading: "The Public Health and Welfare"
number: "16105"
heading: "Biodiesel engine testing program"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/42/16105"
units:
  - "Chapter 149 — National Energy Policy and Programs"
  - "Subchapter VII — Vehicles and Fuels"
  - "Part D — Miscellaneous"
---

# §16105. Biodiesel engine testing program

- (a) **In general—** Not later that[^1] 180 days after August 8, 2005, the [Secretary](/usc/42/15801.md?p=4) shall initiate a partnership with diesel engine, diesel fuel injection system, and diesel vehicle manufacturers and diesel and biodiesel fuel providers, to include biodiesel testing in advanced diesel engine and fuel system technology.
- (b) **Scope—** The program shall provide for testing to determine the impact of biodiesel from different sources on current and future emission control technologies, with emphasis on—
  - (1) the impact of biodiesel on emissions warranty, in-use liability, and antitampering provisions;
  - (2) the impact of long-term use of biodiesel on engine operations;
  - (3) the options for optimizing these technologies for both emissions and performance when switching between biodiesel and diesel fuel; and
  - (4) the impact of using biodiesel in these fueling systems and engines when used as a blend with 2006 Environmental Protection [Agency](/usc/42/8262.md?p=1)-mandated diesel fuel containing a maximum of 15-parts-per-million sulfur content.
- (c) **Report—** Not later than 2 years after August 8, 2005, the [Secretary](/usc/42/15801.md?p=4) shall provide an interim report to Congress on the findings of the program, including a comprehensive analysis of impacts from biodiesel on engine operation for both existing and expected future diesel technologies, and recommendations for ensuring optimal emissions reductions and engine performance with biodiesel.
- (d) **Authorization of appropriations—** There are authorized to be appropriated $5,000,000 for each of fiscal years 2006 through 2010 to carry out this section.
- (e) **Definition—** For purposes of this section, the term “biodiesel” means a diesel fuel substitute produced from nonpetroleum renewable resources that meets the registration requirements for fuels and fuel additives established by the Environmental Protection [Agency](/usc/42/8262.md?p=1) under [section 7545 of this title](/usc/42/7545.md) and that meets the American Society for Testing and Materials D6751–02a Standard Specification for Biodiesel Fuel (B100) Blend Stock for Distillate Fuels.

## Footnotes

[^1]: So in original. Probably should be “than”.

## Source credit

(Pub. L. 109–58, title VII, § 757, Aug. 8, 2005, 119 Stat. 832.)