ATCrunch Thursday, 02/09/17 03:54:05 PM Re: jugs post# 695 Post # of 782 Don't feel bad, I've only just been initiated. PFL is the research group, Progressive fuels limited. RVOs are the targets for each refiner or importer of petroleum-based gasoline or diesel fuel, while RINs allow for flexibility in how each of them may choose to comply. That's from the EIA website. The D classes are the different types of blended fuels. D6 is the renewable credit that CVRR is using.