I always store oldies drained out and… my 75 ETEC fully fueled high octane (no ethanol) and pre-run on 2+4 BRP to stabilize the fuel

13 winters later at -20… -30 C … no issues perfect starts on a dime with the ETEC

old stabilized fuels from oldies are burnt in the cheapo lawn mower only…………….. the subsequent Spring

no issues with the lawn mower either 🙂