I know I know. Really should have asked BEFORE I did it, but it's done. Last oil change, I just dumped the entire 4 gallons rather than metering out that last quart and having leftovers. Really, is there a problem with that? I know about too much oil and the problems it can cause, but I'm figuring with the size of this thing, the one extra quart won't cause problems. If there is, I'll drain the one quart. I have 122k on the clock. Runs well except for the leaky egr coolers which I'll get to soon. I live in NorVa so I can't delete them.