Rotella T6 in a Prius

[Cooker]

Originally Posted By: TFB1


Using my Marauder as a guide, fat chance...

In switching from 5W-20 to 0W-40, I've seen no change in cold pressure(yeah it's probably in relief, I don't care), TWO Lb increase idling, maybe 5psi increase at 2500-3000 rpm and approx a 10 psi increase spinning near 6000 rpm...


And I bet your fuel economy has suffered from the switch

It seems to be one of the first things to come up anytime someone brings up running a thicker oil. I understand that it is possible and should happen in theory, but in the real world I personally have not noticed it yet. I have about 1000 miles on the 40wt in my prius and so far it has made zero changes in fuel economy.

 

[Norm Olt]

"SALE!" Save "UP TO 70% on selected items"...

"You can save UP TO 30% on your auto insurance by switching to..."

NEW! IMPROVED! 0W-5 EXTRAordinary Mark IV NOW! with UNOBTANIUM can give you UP TO 5% better gas mileage...

Please note that these three ads all limit the amount you can "save" by stating that you'll save UP TO a certain amount but make no claims what-so-ever about what your MINIMUM savings will be.

In effect, a guarantee that you won't save 70% on most items on sale, that your insurance premium may only be 5% lower, and that gas mileage may or may not increase, but in no case will it ever increase over the 5% figure.

Note: your individual results may vary.

Cheers!

p.s. These claims of huge gas mileage changes when using modern oils are, for the most part, pure Phoooy IMHO.

 

[Oldwolf]

Makes wonder if I can use my stash of M1 0W40 in my Gen2 Prius. I use 0W30 now, but am out of it and also sold the car I used 0W40 in. Soooo...I have 14 qts of 0w40 lying around with nothing to use it in.

 

[friendly_jacek]

Buy Mobil 1 0W20 and mix it 50/50 with 0W40. You can do 10,000 mile OCI on it easily.

 

[LeakySeals]

Originally Posted By: Oldwolf
Makes wonder if I can use my stash of M1 0W40 in my Gen2 Prius. I use 0W30 now, but am out of it and also sold the car I used 0W40 in. Soooo...I have 14 qts of 0w40 lying around with nothing to use it in.


What does your manual recommended for oil when temperatures are constant over...40F ?

 

[Oldwolf]

Manual recommends 5W30 only iirc. But many users use 0w30, some even use 0w20. I have been sticking with 0W30. The idea of blending 0w20 and 0w40 is intriguing.

 

[oggb]

Originally Posted By: deven
I'll take the lowly Edge over T6 any day...if you follow any of the Subie forums who are notoriously known to run T6 you'll know that T6 is not a long drain oil at all.


The engine in the Prius and the engine in most Subarus share very little similarities besides the fact they both run on gasoline.

-Much lighter duty cycle
-Much lower specific output
-Much lower fuel consumption
-No turbo (it's generally the turbo crowd that loved T6 - I was one of them)

T6 may not be an extended drain oil in a Subaru/Ford F350/Chevy Dmax/etc. but almost anything becomes an extended drain oil in a Prius.