3RZ - 300k oil analysis

[JZiggy]

Background in case you want it, and more old oil analysis reports:

J

Thread '3RZ 235k miles Rotella 5W-40 5k interval'

Feb 27, 2018

Hey folks,

First oil analysis on my 99 4Runner with 3RZ-FE engine. At the time of the oil change the engine oil (Rotella 5W-40 CJ-4) had about 5000 miles on it and the engine had 235k.

Everything looks good except for the 180ppm of sodium. The lab states that they think it comes from the oil additives but both the CJ-4 and CK-4 VOAs don't show sodium: https://bobistheoilguy.com/forums/ubbthreads.php/topics/4490450/1/Shell_Rotella_T6_5W40_CJ-4/SM_

Comments?

• JZiggy
• Replies: 52
• Forum: Used Oil Analysis - Gasoline

Settled back into 5k oil changes since I don't put tons of miles on this truck and many of them are offroad or heavily loaded. Would rather check on things approximately yearly and not longer than that.

I also did a piston soak with Chemtool before this OCI (did a short "rinse" to make sure I got all the solvent out too).

Here's some long term data -- have fun let me know what you think

 

[dnewton3]

I think this is proof why many classic Toyota engines run forever.

 

[fantastic]

Very low wearing engines that Toyota has made. However 300k will take a toll on wear. Do you need to add any oil? Piston soak due to burning oil? You've ran it this far and looks like it owes you nothing. That is a good record keeping you've done. Good job.

 

[JZiggy]

Very low wearing engines that Toyota has made. However 300k will take a toll on wear. Do you need to add any oil? Piston soak due to burning oil? You've ran it this far and looks like it owes you nothing. That is a good record keeping you've done. Good job.

It uses no oil. I had great success with a piston soak on my Toyota van and wanted to see if it would provide any benefit - just an experiment.

Compression tests above spec too.

 

[fantastic]

It uses no oil. I had great success with a piston soak on my Toyota van and wanted to see if it would provide any benefit - just an experiment.

Compression tests above spec too.

All good news. Thanks for the reply.

 

[JZiggy]

Another oil analysis report! This was with T6 10W-30. Interesting that Manganese showed up in the last report and this one, never seen it before. Some googling tells me it's most likely from a fuel additive. I use Techron occasionally, maybe one treatment per OCI.

 

[OilStainedNapkin]

I wish they still made this engine