Yes, I drain it every year at haulout/maintenance, have never seen any even slight contamination. I'm a freak for clean gas, I've been at this a while. A few weeks ago I ran it on a separate 6 gallon tank(it was still sort of running then)
It's quittin' time here on the East Coast, but I was thinking tomorrow, I would drain the VST, and blow out the system w/ compressed air from the low pressure pump to the injector bar and inspect all the gas in a glass jar, I just wish all those weird patterns on my SMIS would go away and I would be sure it's mechanical.
Thanks
Roger