Always wanted to do this

Before last oil change I used an engine flush revved it to 2-3k for 5min and drained the oil it came out nicely, then I put in 6 liters of cheap oil, went and got a 3 piece special from popeyes, drained the oil it was black again and smelled like used oil again. Then I changed filter to WIX and put in redline 5w30 oil.

Oil smells kinda clean now

 

1/4 qt of ATF fluid or marvel mystery oil, or some seafoam and drive it for one thousand miles, will help aswell

Its good you used a cleaner especially on GS300's