Chosen Oil Viscosity...?

Maybe not a high-school-diploma career path.

 

Hahah most certainly not!

"Tribology is the science and engineering of understanding friction, lubrication and wear phenomena for interacting surfaces in relative motion. It is highly interdisciplinary, drawing on many academic fields, including physics, chemistry, materials science, mathematics, biology and engineering."

...tribologist are walking brains!

 

When I was in the drafting office of a smallish fabricator, my business card said "Checker". Then went back to a consulting engineering firm (one I'd been with years previous, under new management), my title was something like (actual terminology eludes me now...): "Senior Technical Consultant". Some horseshit like that.

The litmus test: if someone asks you what you do, you trot out the latter, you'll get puzzled looks.

 

Interesting. He studied advertising but got STLE—Society of Tribologists and Lubrication Engineers—certifications.

https://www.linkedin.com/in/lake-speed-jr-1b2768121/

Tribology is a very complicated subject though. There are professor who dedicate their life on tribology research.

 

Did y'all ever wonder why medical doctors end up at certain fun jobs like proctologist, urologists, or forensics? My co-worker's daughter just graduated medical school and the type of specialty you get into is very cut-throat...you have to send out your resume all over the place, and hospitals that have openings make lists of candidates and you have to interview to get a residency. So you may have a choice of waiting or going into something like proctology or forensics.... especially if you have a large amount of student loan over your head.

 

Oil change with the TGMO 0W-8 JASO GLV-1, which is the recommended oil for the new Corolla and Camry, seems to be extra-charge at the Toyota dealers.

 

In french.. well such is life!

 

What am I looking at? The graph at top looks interesting, irrelevant though?

 

It's the recommended oil graphs from Toyota. It says that using the alternate oil grade won't impact warranty if used only one time if the recommended oil grade isn't available. In the case of 0w8, i would use 0w16 and keep all my receipt as it's on back order at Toyota since a long time ago...

Here is the complete english version.

 

Only Toyota Canada prints these charts.

 

Thread revival.

Changed my oil again today.. Was still looking funny even if it only saw summer use and lots of highway use. Those engines definitely are hard on oil so i tried something different that i had here anyway. The Civic's K24 really loves Redline oil and the Fram Ultra is better then those OE Denso filters at filtering fine crap so i guess we'll see what happens.

 

Update.

Those are the filters i'll be using now. The new Tundra filters. Same as the factory 10009 but a bit longer.



Bigger openings at the base plate, more pleats and what seems to me as better filtering media. I'll report back when i'll open one... probably next spring..

 

I started using the F1 after my first oil change.

 

I ran 0w16 in the 19 Prius AWDe we had up until about 40k, then went to M1 0w20EP up till 100k when sold. Engine noticeably quieter, and no noticeable drop in mileage. The 24 , when I change the first time, will get the same M1 0w20 EP

 

My concern over using the lightweight 08, 16 and 20 oils is increased oil consumption. eg Many Gen 3s have an oil consumption issue which leads to clogging a poorly designed EGR valve which leads to blown head gaskets. Using a thicker oil lowers that consumption, I've tested it on my own cars. There's also the added benefit of helping piston rings seals better, for more power. Though this only really factors when the rings are wearing out.

If your Gen 5 isn't burning excessive oil, using the 16 weight is probably fine for the long haul, but if you went to a 20 or 30 (probably even a 40 weight), you've not going to blow up the engine, as higher oils are specified in different parts of the world for the same exact engine. eg Many BMW engines spec 30 weight in the US, but 40 in Europe. This is because other parts of the world are okay with taking that 0.42 hit to their MPG when using heavier oils, in exchange for more protection, especially under higher stress.

The main drive to lighter and lighter oils is to eek over every bit of MPG to meet the Corporate Average Fuel Economy standards, and whatever they're called in other parts of the world, I know the EU has similar to the US. It's not to increase engine life, but that doesn't mean these light oils are engine killers.

As for people claiming the Prius engine doesn't warm up, that's nonsense. It warms up and stays at operating temps. Even when only driving at lower speeds.

 

I don't think you'll have oil related problems with the thinner oils as long as you're dillugent in regards with oil changes intervals.. 10k miles il a lot to me for a hybrid engine that seldom gets up to operating temps.. mine anyways...

 

Update! It appears this Prius LOVES Redline oil!!!!

Compare what just came out of the sump..



...to what used to come out of it (TGMO 0w16, Pennzoil Ultra Platinum 0w20)


Too bad we're at the shitty time of the year as the only Redline i have left is a Quart of 0w20 and 3 of 5w30... i'll do another round with TGMO 0w16 and see if that time was fluke but until proven otherwise, the M20A-FXS really loves Redline. Just like the good 'ol K24Z7 also loves it!

I'll report back next spring.

 

I would never use the Red Line oil, which has a high amount of polyol ester (POE) in the base oil. That is because it almost always results in high bearing wear. It has to do with the oil not being balanced and the POE somehow harming the lead or perhaps interfering with the antiwear film though competition for the surfaces.

By the way, TGMO has a good amount of POE, too, even though much less than that of Red LIne.

There is no reason to use Red Line in the Prius. TGMO, when changed regularly, is more than sufficient.

 

I mostly agree that TGMO is more then sufficient. I just didn't loved what i saw when i dumped both TGMO and Pennzoil UP... 2 oils that i still hold in high regards. The Redline test was purely done because i had some around and i've heard numerous times that Ester based oils are great at dealing with fuel dilution. Now, i haven't done no UOA (would have had to do 2 OCI with the same oil anyway..) but i really liked what i saw.

One thing i wonder however, is the claim that TGMO has a lot of POE. I know as a fact that the GLV-1 0w8 is Gr3+ GTL based oil as it was required to pass evaporation tests at that weight. But POE? Not saying you're wrong, but i'd like to see some hard proof as i think that both TGMO 0w20 and 0w16 are Gr3 based.

As for the oil i will use next time, there was a great rebate on Pennzoil Ultra Platinum around here (25$ for 5l) and i do oil changes for both my 2 cars and those of relatives so i replenished my Pennzoil Stash in both 0w20 and 5w30 (for the Turbo Skyactiv and the K24). Might have enough for a year, maybe 1 and a half..

 

I'm thinking hard about switching to Valvoline Restore and Protect once I run out of TGMO(2 oil changes worth). I'd have to switch to 0W-20 as VRP doesn't come in 0W-16, but it might be worth it to keep those rings clean. Maybe I'll alternate between VRP and TGMO.