Changed my oil today. I went a ways over the regular minder, probably 1-2k. I’ve always gotten a full pan out of it when I drain the oil but today o only drained about 3ish quarts total. It’s never been that low. It doesn’t leak for sure. Is this something I should be concerned about? I don’t notice any burnt oil smells with the exhaust or with the hood open.
A general rule I've always known is conventional oil degrades and burns much faster after it eclipses the 3,000-5,000 mile mark, depending on how crappy the oil is.
The Oil Life Monitor (OLM) calculates from a handful of factors to estimate the oil's life. It doesn't actually analyze it. It just makes an educated guess by the run time, idle time, temps, loads miles, etc. the engine is subjected to after every OLM reset. The OLM is known to be very lenient and "those that know" don't trust it and stick to a regular schedule.
+1 for changing it every 5K, regardless of what the DIC says. If you insist on going by the DIC, use synthetic and change it when the DIC is at 50%. Get it outta your head that you're being wasteful or over-changing it. The cost and hassle of that extra oil change or two per year is FAR less than that of a major engine repair or replacement.
Oh, and screw what GM says is "acceptable" for oil consumption. They say a quart every 2,000 miles is acceptable. BS.