A state inspector who visited Fastop on July 17 determined that a "delivery truck dropped diesel in the unleaded fuel tank and unleaded fuel in the diesel tank," Helfrich said.
The Motor Fuels Section dispatched an inspector to take fuel samples in response to two complaints received from Fastop customers. One of the complainants filled up the morning of July 17, while the other didn't specify the time they pumped the contaminated gas.
Fastop and its parent corporation, Pioneer Petroleum, has received about 20 separate complaints about contaminated fuel, Helfrich said.
Read more: https://www.citizen-times.com/story/news/local/2019/07/18/official-contaminated-gas-arden-fastop-damaged-cars/1765960001/