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Update: the $200 Minivan Ultimate is STILL going strong. For funs we had it painted by a local muralist, then loaded the family up and did a mega northeast road trip. No Lucas, just M1 High Mileage 10w40. Stay tuned for an upcoming UOA 👍

I've mostly been using Mobil 1 HM 10w40 with good results (low wear and reduced oil consumption) and I've been assuming it to be superior to Castrol's GTX HM 10w40 by virtue of Mobil 1 being a full synthetic vs Castrol being a synthetic blend. Is that a safe assumption? I did notice that V@100c...

We bought the car for $2200 four years ago. It’s been getting 42-45mpg and hasn’t required any significant repairs, just minor items I’ve done in my driveway w the help of YouTube. It paid for itself on year 2, every drive now is gravy and … it’s functioning flawlessly. These gen 2 Prius are...

When I bought our 2006 Prius four years ago l sent the oil that was in it to our local Carter CAT Fluids Lab for analysis ... and the results terrified me! Crazy high levels of the wear metals Copper and Lead (potentially bearing and bushing wear). I thought for sure the engine had been...

??? This is EP Triple Action from Walmart:

Engine warm and running. Remove the seal from the oil sample container, but don’t open it. Turn the engine off. Go right under the car and remove the oil drain plug. Open the sample container and 3/4 fill it from the oil drain stream. Seal and label the container. Mail the used oil sample to the...

Outback Wilderness

I find it interesting that the 0w20 and the 10w30 have identical pour points:

This guys silicon was quite high too: https://bobistheoilguy.com/forums/threads/2023-subaru-wrx-factory-fill-and-1st-change-uoas.376910/ tho not 539. I’ll see what happens at the next change. Thanks for the info on the Purolator filter. 99% at 26 microns is solid!

The first oil change is supposed to be at 6 months or 6000 miles. At 7 months we still didn’t even have 2000 miles but I changed the oil and did this UOA. Recommended oil is 0w20. Subaru says if that’s not available using 5w30 is acceptable. If a thicker oil is acceptable / will not void the...

All are listed chronologically, so the one labeled Amsoil (meaning contains Amsoil Engine Flush) is the post-flush UOA. The pre-flush is the UOA to the right of it.

My results were basically identical to yours. I’ve done 7 UOAs on this car and I shared them all in my last post.

UOAs are back! Below is the complete UOA history for this Prius. The first UOA was scary, but the car was running well, I didn’t panic and the crazy high copper and lead numbers started to come down. Eventually switching to Mobil 1 HM 10w40 reduced oil consumption and wear numbers. (You can see...

🤣 no! But in each career I’ve had I’ve done a bunch of the promo videos and social media. I now work in traffic engineering, here’s a preview of a project that we’re now finishing up:

UOA #1 - used oil sampled just prior to adding flush Flush added and engine run for 20 minutes, then UOA #2 - taken ~25 minutes after sample 1, contains used oil, Amsoil Engine Flush and whatever the flush was able to clean from internal engine surfaces and suspend in the oil. Note: oil...

I don’t know! It’ll be interesting to see if the two UOAs are significantly different. I have a handful of UOAs for this car, it generally has elevated lead. We got the car for $2200 with 220k miles and we’ve driven it about 55k miles all at 40+ mpg so it’s been a reliable, $$ saving, good...

Here’s the process I used to complete a thorough Amsoil Engine Flush on our 2006 Toyota Prius with 275,000 miles on it. I also captured before flush and after flush used oil samples that I will be sending to our local Carter CAT SOS Fluid Analysis lab to answer the question: Does Amsoil Engine...

And @Escape08 - as @ZeeOSix has clarified, even the cartridge filter ends you referenced are sealed. I made this short video to show how and why this particular design needs completely sealed ends:

I’m guessing the Toyota filter pictured is sealed top and bottom when inserted in the cartridge? The Mann filter ends are clearly sealed. ST filter ends in the original post are supposed to be sealed. 1/3 of one end is not. That is no buenos.

The problem is when Fram tech support tells you expressly that the published ISO 4568-12 info on their boxes and website is not applicable to their current filters. The gold standard is Purolator providing ISO 4568-12 results for each individual filter. Also, even tho this particular Best...