Originally Posted by kschachn
The EPA mandates a minimum level of detergent additives in gasoline? I didn't know that.
I know the EPA must have certification from the blender for what additives and what concentrations, but that is related to toxicity regulations.
There's a required efficacy for a minimum recommended treat rate. I believe they're allowed to use a higher concentration. It's longer than can be posted here, but this gives the gist:
Quote
https://www.ecfr.gov/cgi-bin/text-i...:17.0.1.1.9&rgn=div5#se40.19.80_1161
§80.161 Detergent additive certification program.
(a) Effective dates and applicability of requirements. (1) As of July 1, 1997:
(i) Detergent additives for the control of port fuel injector deposits (PFID) and/or intake valve deposits (IVD) in gasoline engines may not be transferred or sold for use in compliance with this subpart unless such additives have been certified according to the requirements of this section.
(ii) Except as provided in §80.169(c)(8), PFID and IVD control additives may not be added to gasoline or post-refinery component (PRC) for compliance with this subpart unless such additives have been certified according to the requirements of this section.
(iii) Gasoline may not be sold or transferred to a party who sells or transfers gasoline to the ultimate consumer unless such gasoline contains detergent additives which have been certified according to the requirements of this section.
(2) Beginning August 1, 1997, all gasoline sold or transferred to the ultimate consumer must contain detergent additive(s) which have been certified, according to the requirements of this section, to be effective for the control of PFID and IVD in gasoline engines.
(3) Except as specifically exempted in §80.173, these detergency requirements apply to all gasoline, whether intended for on-highway or nonroad use, including conventional, oxygenated, reformulated, and leaded gasolines, as well as the gasoline component in mixtures of petroleum and alcohol fuels, gasoline used as marine fuel, gasoline service accumulation fuel (as described in §86.113-94(a)(1) of this chapter), the gasoline component of fuel mixtures of petroleum and methanol used for service accumulation in flexible fuel vehicles (as described in §86.113-94(d) of this chapter), the gasoline used for factory fill purposes, and all additized PRC.
(b) Detergent additive certification requirements. For a detergent additive package to be certified as eligible for use by detergent blenders in complying with the gasoline detergency requirements of this subpart, the requirements listed in this paragraph (b) must be satisfied for such detergent. Subject to the provisions of paragraph (e) of this section, if the certifier fails to conduct the specified tests or to submit the specified materials, or if EPA judges the testing or materials to be inadequate, or if the detergent fails EPA confirmatory deposit control performance testing pursuant to §80.167, the Administrator may deny or withdraw the detergent's eligibility to be used to satisfy the detergency requirements of this subpart.
(1) The detergent additive manufacturer must properly register the detergent additive under 40 CFR part 79. For this purpose:
(i) The compositional data required under §79.21(a) of this chapter shall include the information specified in §80.162.
(ii) The minimum recommended additive concentration required under §79.21(d) of this chapter shall be reported to EPA in units of gallons of detergent additive package per 1000 gallons of gasoline or PRC, provided to four digits. This concentration is the lowest additive concentration (LAC) referred to in §80.170, and shall be reported as follows: