Petroleum generator will only take one comb. Liquid at a time

Log is zipped, because I kept getting an error (-200) when I tried to upload unzip.  Change extension from txt to zip to extract.  Log file also has numerous hundreds of duplicate lines removed to get it under the 2mb limit, which turned out to be in vain since I wasn't able to upload it without zipping. I was unable to upload the save file, as it violates the 2mb limit.

Edited April 12, 2020 by Crono141
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Yep, this is the exact issue.  With no way to empty it you have to destroy and rebuild the building every time you change fuels.

Personally, I'd rather the building take the combined fuel mass in storage  when it checks to see if it can produce energy, and then it deducts the mass first from the smallest amount in storage.  This would allow the building to run on a combined ethanol/petrol line without issue.