Stupid me. Do not do this. After flushing the engine of my newly acquired 184K mi, one-owner 2006 Vibe (Moon & Tunes), with LiquiMoly, I proceeded to run 4qts of ‘cheap’ 5W-20 Synthetic (on sale NAPA), to flush out the flush. After a few days driving with the ‘cheap’ flushing oil, I drained it,...