What to know about Oil Analysis Tests: MVS Forums members rspi and CN90 and others discuss the utility in getting engine oil analyzed by a lab.
At this age/mileage (160,000 miles for me), it is a good idea to do an oil analysis to check on the health of the engine.
Let’s say there are leaky injectors, it will show as fuel dilution.
Or let’s say there is internal coolant leak, glycol will show up in the oil.I recently did a Stage 0 tune-up (new spark plugs, cap/rotor, Bougicord, new fuel filter, FI cleaner etc. etc.). You can tell the oil analysis looks good after 5,000 miles. See the report! Oil Analysis Tests
rspi »
I did send in a sample to Blackstone for testing at about 225,000 and got the report back that at 5,500 miles my oil had 57% of its additives left. Meaning that I could probably change every 10,000. They recommended that I bump the changes to 8,000 and retest. I now change at about 7,500 but have NOT sent another sample in yet. I have two and will likely send one in.
Not sure where I posted the results but they claimed that my motor was burning very clean for it’s age and there was very little of anything in the oil other than valve stem seals I think. The report shows what particles were in the oil in parts per millions I think and that different parts are made of different materials. So, if a crank bearing is wearing, it would have that material in the oil.
I’ll see if I can find the report and link the photo here… You can always see one on their site if I don’t find mine.
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Last Updated on February 4, 2025
