I started this as a new thread even though I posted this on page 2 of an older thread. I wanted to experiment with a 10,000 oil change and installed Mobil 1 5W-20 in my 2006 Lexus RX330. At 5900 miles on the oil (the vehicle has 41000), below is what Blackstone said. I'm disappointed and wondering exactly what's going on. It's possible, I guess, that the prior oil change at the dealer (with my oil) didn't drain all the oil or didn't change the filter, but they've generally been a good dealer so I can't assume they goofed. Any thoughts about this:
"Universal averages show typical wear for this type of engine after ~6,100 miles, so your wear metals are a little higher than average, but only lead (from bearings) is high enough to highlight. Silicon or sodium may show the cause; neither one is an additive in Mobil 1, so unless these are residual from a
previous oil, silicon might show dirt and sodium might show antifreeze. Neither is a big problem yet, but better to catch it early, so check the air filter and watch for a coolant leak. The TBN is good, at 2.8 (1.0 is low). Change this oil and check back in 6,000 miles."
"Universal averages show typical wear for this type of engine after ~6,100 miles, so your wear metals are a little higher than average, but only lead (from bearings) is high enough to highlight. Silicon or sodium may show the cause; neither one is an additive in Mobil 1, so unless these are residual from a
previous oil, silicon might show dirt and sodium might show antifreeze. Neither is a big problem yet, but better to catch it early, so check the air filter and watch for a coolant leak. The TBN is good, at 2.8 (1.0 is low). Change this oil and check back in 6,000 miles."
