The National Renewable Energy Laboratory (NREL) has released a paper addressing the compatibility of E15 with gas station equipment. “E15 and Infrastructure” looks at compatibility of E15 through a literature review of published works by refueling equipment manufacturers, industry groups and federal agencies. The paper also includes a summary of applicable codes and standards, review of equipment manufacturer products, and verification with manufacturers regarding which ethanol blends work
with their products.

The report also addresses several misperceptions about E15 including that it is safe to store the ethanol blend in tanks. The paper states that for many decades, underground storage tank manufacturers have approved their tanks for blends up to E100, more specifically, all steal tanks and double-walled fiberglass tanks since the year 1990.

As part of the study all fuel and vapor handling equipment was reviewed to determine if it was certified by a third-party (such as UL) and if it was listed for specific ethanol blends. The aggregated list confirms there are UL testing standards available now for all gasoline–ethanol blends from 0% to 85% ethanol. The appendices includes a full list of E15 and E15+ compatible equipment. The literature review also finds that there were no incidents of E10 causing releases from UST systems were identified.

The study concludes, “There are future opportunities for retailers to remove or replace their current equipment not necessarily related to continuous changes in motor fuel composition. Credit card companies are requiring retail fueling stations to update their dispensers to accept new chip and PIN secure credit cards by October 2017, at which time fraud liability would switch to station owners if they have not updated their equipment. This presents an opportunity to increase E25 UL-listed equipment through a retrofit kit if electronics are being upgraded to accommodate the new credit cards, or if a station owner must purchase a new dispenser, it could pay a minimal amount more for an E25 dispenser. If a new dispenser is purchased, this may also present an opportunity to
upgrade to an E85 dispenser, but at significant additional cost.”