I have a Mityvac that I use for topside oil changes on my BMW and VW. However, the suction tubes were too short for the Tundra 5.7, always leaving two quarts behind. I bought a set of extended length tubes recently and tried them out this weekend on my 5.7. I sucked out around 7.5 quarts and Does all the oil come out with a topside change? I'd have to think a bit of oil is left behind. Measure what comes out to find out for sure. My dealer does not remove drain plugs, they told me it's topside only for them. I bought one from Amazon to use on my GTI that was called the Top-Sider & it failed the first time I tried to use it.