2026 Prius 0W-8 oil!!!!

[dbvettez061]

View attachment 295109

You can use up to 30 grade in your engine. You'll be fine with 0w-20. Dealers don't uoa engines. Grades below 20 have a poorer noack.

Intelligent data and reply. Thank you.

 

[We're Metals]

Intelligent data and reply. Thank you.

Why didnt you pull up the owners manual then?

Just like all Prius that came before it... Run what Toyota specifies and the engine will outlast the car. 0w-20 will work fine, thats what I would run.

I think the below was the best resopnse:

These ultra-thin oils are viable only because of very low average oil temps and highly transient duty cycles.

Personally, I'd be using HPL 10w20 in this application. Super low volatility but still thin enough for a highly transient cycle where oil pressure delay is important, it has a super combination of HTHS/KV100 and volatility.

On EDIT: Apparently Toyota has been able to produce match fit bearing clearances in the 10-20 micron range. So we're talking one half to one quarter of one thousandth of an inch. I guess that's what it takes to make the 0w-8 function well in the mains and rods.

The other main design aspects are extremely fine surface finishes-- Superfinish or DLC used many places.

My 2.5L Hybrid Rav4 rarely gets above 170-180 degrees engine temp.

 

[Bighorn2500]

I'm just waiting for some 0w1 to come out in a vehicle, then see who throws 15w40 in it first

 

[Hohn]

Bearing tolerances clearances, maybe? Anyways, I'm not a machinist (but my son is and I don't have his knowledge) but 20 microns is .0007874 inches.

FIFY. We need to keep correcting this until it sticks.

Heck I had to correct GROK AI on this and the AI responding with "my bad, you are correct."

 

[STMech]

These ultra-thin oils are viable only because of very low average oil temps and highly transient duty cycles.

Personally, I'd be using HPL 10w20 in this application. Super low volatility but still thin enough for a highly transient cycle where oil pressure delay is important, it has a super combination of HTHS/KV100 and volatility.

On EDIT: Apparently Toyota has been able to produce match fit bearing clearances in the 10-20 micron range. So we're talking one half to one quarter of one thousandth of an inch. I guess that's what it takes to make the 0w-8 function well in the mains and rods.

The other main design aspects are extremely fine surface finishes-- Superfinish or DLC used many places.

GM needs to talk to Toyota about how to do a polished surface on a crankshaft. GM owners probably need some counseling about now .

 

[DirectRejection]

Is this true I can’t get a solid answer anywhere. My new car will be in mid September, just doing some research…. Thx in advance.

See my threads.

I have been using highest quality 0W8 in the M20A-FXS / M20A-FKS series engines for 250k miles.

As @TiGeo would say:
" Designed to run thin oil ."

 

[SubieRubyRoo]

My signia is a hybird and the engine turns on and off a lot around town like your prius will. I'm sure 0w-16 will be fine if you want to run that.

What’s this new Toyota hybird stuff? Did they finally perfect the flying car while I was busy ignoring BEVs?

 

[kschachn]

As @TiGeo would say:
" Designed to run thin oil ."

Designed to permit the use of thinner oils without incurring excessive wear under most circumstances, but not required and sometimes not beneficial.

 

[DirectRejection]

Designed to permit the use of thinner oils without incurring excessive wear under most circumstances, but not required and sometimes not beneficial.

I just followed @TiGeo 's bingo card.

 

[kschachn]

I just followed @TiGeo 's bingo card.

Yes you were.

 

[rondhol]

In term of stability, 0w8 need much less viscosity improver and can use basic base oil. I believe the key is the good engine design that can take such thin oil.
I do not mind using 0w8 if the price is similar to 0w16. Otherwise, I will take 0w8 to 0w16 as the same class of oil.
I know that Toyota still use 0w-20 for its Turbo engines

 

[Urshurak776]

I would just use 0W-20 as it is readily available almost anywhere. Won't hurt a thing.

 

[nthach]

I’m shocked Toyota didn’t outright spec the current Prius for 0W-8 from the start(2023), as well as the refresh of the RAV4 Hybrid. The current Camry calls for 0W-8. 45K in, no problems. It’s driven by an old woman now(my mom), so I have no problems with using thin oils.

 

[Dave P.]

.

Oh, to be new here again.

It's like joining a fraternity. First you get hazed and abused and if you can take it, you gradually get accepted.

 

[Jetronic]

FIFY. We need to keep correcting this until it sticks.

Heck I had to correct GROK AI on this and the AI responding with "my bad, you are correct."

But did it stick?

 

[Hohn]

See my threads.

I have been using highest quality 0W8 in the M20A-FXS / M20A-FKS series engines for 250k miles.

As @TiGeo would say:
" Designed to run thin oil ."

Every thickie needs to read those threads. All of them. I'd perhaps tweak the maxim to say "designed to tolerate thin oil."


I hate to quote the man, but "application dictates chemistry."

 

[Hohn]

But did it stick?

It's grok. The corrections last until you close the window. Then it's back to normal error.

 

[Jetronic]

It's grok. The corrections last until you close the window. Then it's back to normal error.

Makes me question how intelligent it all is.... I'm certain it's artificial though.

 

[TiGeo]

Designed to permit the use of thinner oils without incurring excessive wear under most circumstances, but not required and sometimes not beneficial.

Yeah. I don't think I ever said that...

 

[TiGeo]

I just followed @TiGeo 's bingo card.

Had to re-tool my meme to fit within the BITOG ecosystem...