I agree, check with them. I have a can and have not opened it yet but I was curious and thought I would let them know what was being discussed because I work in a position where things can go down hill fast without me knowing what happened and it comes back on me...I give no excusses, things happen, I just fix it.
Anyway, here is their prompt reply (took only 30 minutes). In their favor, please don't call them unless you have an accurate way of measuring and have legitimately investigated this claim:

Tim,

I was contacted by RCU regarding a post that was made regarding fuel
level. Since all of our machinery is automated, I instructed the
moderator to have anyone that felt they received fuel that was off
calibration to call me directly. I have yet to receive a call. If a
customer has a problem or suspects there is a problem, they should call
Powermaster direct 1-800-847-9086 ext 2# to get it resolved. Thank you
for your input.

Laura Sorenson