the VST holds a lot of gas...i think it would take a long time to empty at idle before it starts run on your fuel cocktial.
but we do this.....
-just did my buddies F150...we used a portable tank with 1 gal of premium gas and almost a full quart of 2 cycle oil outboard oil and star-tron stable. (
https://www.walmart.com/ip/Pennzoil-...-1-Qt/16401579 )
-I did my my F150 mid October..I used a portable tank with non-ethanol fuel 50:1 mix from lowes...this was my 2nd season doing it this way. but i think next fall i'm just going to use the 2 cycle oil.
Process is...
1. start your outboard and let it idle for a few minutes.
2. drain the VST.
3. hook up tank to motor filter.
4. squeez ball to fill vst etc.
5. start and run for 5 minutes.
6. drain vst again.
7. reinstall fuel line
8. change motor oil.
9. I did some fogging oil in the spark plugs but it may not be necessary with all that oil.
10 lower unit oil.
11. spray silicone on motor and wipe clean.
12. done.
tony