If you’re an advanced DIYer, you’ve probably heard that term before. The proper nomenclature is actually “spectrographic oil analysis,” and it has been used for decades by oil companies, fleet operators, race engine builders, and others to measure the condition of engine oil.
During this analysis, the user sends a sample of oil to a spectrographic analysis laboratory, such asBlackstone Labs, where a portion of the oil sample is run through a spectrometer. That device analyzes the oil and gives the levels of the various metals and additives which are present in the oil. Those levels are a measure of how much your engine is wearing.