### Question
Can you define what 90/10 mixed-fuel vehicle means?


### Answer
**90/10 mixed-fuel vehicle** is defined as the following in *26 U.S.C. § 30B*:

> a mixed-fuel vehicle which operates using at least 90 percent alternative fuel and not more than 10 percent petroleum-based fuel

#### Citation:
  - *26 U.S.C. § 30B*
  - Heading: **Subtitle A-Income Taxes > CHAPTER 1-NORMAL TAXES AND SURTAXES > Subchapter A-Determination of Tax Liability > PART IV-CREDITS AGAINST TAX > Subpart B-Other Credits**

