Penrite Synthetic Gearbox Oil

71coast79 · Postby **71coast79** » Fri Nov 18, 2016 2:12 pm

Need to get my gearbox oil changed. Dealer advised that they do not stock synthetic so I will need to provide it myself! Suits me as it saves paying dealer's inflated price for lubes.
My NC1 handbook calls for 75W-90 but the Penrite Pro Gear is 75W-85. Has anyone had good, bad, indifferent experience with this oil or should I upgrade to a Mobil or Castrol synthetic which I think is 75W-90?

manga_blue · Postby **manga_blue** » Fri Nov 18, 2016 2:22 pm

Penrite do make a ProGear 75-90W in GL5. There's absolutely nothing wrong with the quality of Penrite oils. There are however all sorts of problems with the prices for Mobil/Castrol/Shell oils.

madjak · Postby **madjak** » Fri Nov 18, 2016 2:25 pm

I rate the Penrite Pro Gear oil equivalent or better than Amsoil MTG so yes it's good. From my use (track work) I recommend using it over anything else. I think I'm using the 75-85W.

zossy1 · Postby **zossy1** » Fri Nov 18, 2016 9:15 pm

madjak wrote:I rate the Penrite Pro Gear oil equivalent or better than Amsoil MTG so yes it's good. From my use (track work) I recommend using it over anything else. I think I'm using the 75-85W.

Me too... and I've tried most oils out there.

Penrite 10-tenths is genuinely fabulous stuff in a 6 speed.

Code4 · Postby **Code4** » Fri Nov 18, 2016 9:55 pm

I've switched to Penrite in all my cars after trying it in my NB8A. Top product.

Code4 · Postby **Code4** » Fri Nov 18, 2016 9:57 pm

In the NB8A they recommend Semi-Synthetic 75W-90 for the transmission and it eliminated the 'snick' 'snick' after the change from the ? oil used in the previous service.

RS2000 · Postby **RS2000** » Sat Nov 19, 2016 8:45 am

Code4 wrote:I've switched to Penrite in all my cars after trying it in my NB8A. Top product.

Likewise with me!

71coast 79 - check your manual for GL spec, as some g/boxes take GL4 or GL5, whereas some are GL4 only.
zossy1 - I've only seen 10 tenths in their engine oil range ?

zossy1 · Postby **zossy1** » Sat Nov 19, 2016 8:59 am

Right you are, its Pro Gear I use

http://penrite.com.au/products.php?id_c ... oducts=376

It's the yellow text on the bottle that stuck in my head

Nevyn72 · Postby **Nevyn72** » Sat Nov 19, 2016 10:32 am

As far as I know the NC is a GL-4 only gearbox.

Best option (IMHO) is Redline MT90. :wink:

GR124 · Postby **GR124** » Sat Oct 06, 2018 8:35 pm

Hey guys I know it’s an old thread I’m bring to the surface again but it’s just the topic I’m after.
I refer to NB8A, year 2000, five speed
I was about to fill the shifter turret. Thought I double check the quantitie required, around 90ml. With that sorted I checked my oil I grabbed for this track car.
Penrite Full Synthetic 75-90, in small print reads GL-5.
The Penrite app recommended semi synthetic GL-5.

I’m not so worried about the semi or full syn. My concern is the GL-5, are any of you guys using this oil with GL-5 rating? After some on line searches I got mixed results about GL-5 vs GL-4

Magpie · Postby **Magpie** » Sat Oct 06, 2018 8:55 pm

I have in the past used Amsoil GL4 in my 6 speed however have switched to a Takumi GL4 and I could not tell the difference.

RS2000 · Postby **RS2000** » Sat Oct 06, 2018 10:20 pm

GR124 wrote:I’m not so worried about the semi or full syn. My concern is the GL-5, are any of you guys using this oil with GL-5 rating? After some on line searches I got mixed results about GL-5 vs GL-4

The factory workshop manuals I have say:
5 speed - GL4 or GL5
6 speed - GL4

GR124 · Postby **GR124** » Sat Oct 06, 2018 11:11 pm

RS2000 wrote:
GR124 wrote:I’m not so worried about the semi or full syn. My concern is the GL-5, are any of you guys using this oil with GL-5 rating? After some on line searches I got mixed results about GL-5 vs GL-4

The factory workshop manuals I have say:
5 speed - GL4 or GL5
6 speed - GL4

Hey RS, just confirming your workshop manual is for the NB8A year 2000?