Does gas in a plastic container really lose octane almost immediately and how much could it lose?
The amount of vapor that passes through a plastic gas can are so amazing we suggest you read the report yourself, see——section. Yes octane, which is now boosted with ethanol, will evaporate quickly causing extreme octane loss and with an old, poorly sealed can and a hot, summer you could loose as much as 10 octane points in two weeks time.
