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Has anyone done this at the 10K /1 year service interval? I am thinking of skipping my 5K service and so if no one has done it yet I may do a blackstone analysis at 10K.

It would be interesting to drain enough for the analysis (use extractor thru fill tube) at 5K. Oil change shop would likely do at no charge.

Would help settle the debate of 5K vs 10K oil changes.

 

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The big day has arrived! 3rd oil change ever completed with 9600 miles on the oil. They’ve been done at roughly 2500, 10k and now 20k miles. Terrain is somewhat hilly and most driving is on the highway. I’ve only used Pennzoil Platinum Full Synthetic 0w-16 and OEM oil filters. The TBN registered a 2.8 after 9600 miles so there was plenty of additive left for more miles.

This will likely be my last UOA for the RAV4 as I know I can run Pennzoil no problem for the recommended interval. I’ve got a ton of SuperTech that I’ll use now, we’ll see if I feel like getting that tested for the 30-40k interval.

Also of note: the appearance of the oil. It flowed like 0w-16 but looked like mud. Color isn’t an indicator of life, just that it’s doing it’s job

Wear-in material is washing out nicely. There isn't as much metal or silicon in this oil as last time, and that's after keeping the oil in use for a longer run. We should find more progress in the next report as the rest of the wear-in material washes out of the engine. Once it's gone, wear metals should stay fairly steady. Iron is the one that tends to fluctuate the most based on the type of use the engine experiences, and how long the oil is in place, but the other wear metals should stay close to average regardless. The TBN is 2.8 - strong. Try 11K miles if you want.

Nice report. Above from your report.

Do the "gurus" (and I use that word with respect) at Blackstone and BobistheOilGuy think it best for wear-in metals to be washed out as quickly as possible ? Reason ?