I have been using a FRAM SureDrain SD2 for over a year now. Very convenient and clean to work with. I pulled off the SureDain the other day after it had stopped draining all of the oil. An additional 1/3 qt. came out when I removed the plug. I guess the bolt that goes into the oil pan really does hold some oil in as others have speculated. I know that some oil pans are different, but in my application it kept the 1/3 qt in. Valve was on a 2002 Honda CRV.
Just thought you fellas with Suredrains should know.
Just thought you fellas with Suredrains should know.