is Penrite 85W-140 suitable for street use?

[AE86.cn]

i have an 86 with a T50 and an open diff.
i want to use Penrite 85W-140 for both gearbox and diff.
is it suitable for hard street use? (i change gear around 4000 at most of the time)
it's my daily ride, and i usually go hill running and do a little bit of sliding.

[patience]

I was using Penrite SIN
80W-140
was nice and smooth, can't see why not
was using it for the same applications you are/would be

[AE86.cn]

<div class='quotetop'>QUOTE (patience @ Aug 11 2008, 06:20 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=574270)</div>
I was using Penrite SIN
80W-140
was nice and smooth, can't see why not
was using it for the same applications you are/would be[/b]
did you use it in the gearbox?

[Simon-AE86]

its not a gearbox oil its a hypoid gear oil. So its for diff's only.

[AE86.cn]

what about motul 75W-90, it's for gearbox right? can you use it in the diff too?
what's gonna hurt if i use Penrite 85W-140 in the gearbox?
thanks

[Simon-AE86]

it prob wont blow the gearbox up, but at the same time, its not designed for syncro's and gears that change constantly, so you could expect some accelerated wear.

Just use castrol VMX80 if your after a good manual gear oil on the cheap.

[patience]

<div class='quotetop'>QUOTE (AE86.cn @ Aug 11 2008, 07:17 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=574322)</div>
did you use it in the gearbox?[/b]
Seeing as it was gearbox oil

yes

mine was marginally different to the oil I think you're using
But viscosities are relatively the same

just use gearbox oil for your box and limslip for your diff

[Simon-AE86]

the 80W140 is NOT a gear oil.

As taken from the penrite website.

<div class='quotetop'>QUOTE </div>
HYPOID 85W-140

Designed for use in heavy duty or older differentials and where specified by the manufacturer. Mack approved. SAE 85W-140, API GL-5, PG-2, MT-1, Mack GO-J, MIL-L-PRF-2105E[/b]

Full link to their range HERE (http://www.penrite.com.au/files/GEM4VXZK75/Gear-Oil.jpg)

[AE86.cn]

thanks for the link

"Penrite SIN GEAR OIL 75 AND 80
Fully synthetic gear oils designed for maximum protection, life and performance. Exceeding API GL-5 and GL-6 they may used in transmissions and differentials of all types of high performance cars. SIN Gear Oil 80 has been especially enhanced to survive the extremes of V8 operations. "

this oil seems good to be used in both gearbox and diff?

[AE86.cn]

here is more details: http://www.penrite.com.au/files/YLTCXH148R...%20AND%2080.pdf (http://www.penrite.com.au/files/YLTCXH148R/SIN%20GEAR%20OIL%2075%20AND%2080.pdf)

do i need 80?
or 75 will do for me?

[Simon-AE86]

thats correct, some gear oils are designed for both, and other oils are designed for ONE or the OTHER. Basically it comes down to reading the lable before purchasing ;)