Penrite Sin 75 ?/sin 80 ?

[BASHO]

Anybody used Penrite SIN 75 (75x90) gearbox oil or have any comments on it ? There is also SIN 80 (80x140) which may ? be a goer for summer--or not ?

I'm thinking of using it in my R34GTT as I used Penrite 10/10 SIN in a WRX gearbox a fair while ago and it worked well but for a Skyline well , I know nothing

[NYTSKY]

Ill be putting some Penrite 75 in my gearbox soon.

Let you know how it goes.

[skylinekid]

i put sin 75 in mine the viscosity u list isnt wat the bottle has on it it said 75-85.... had it in for 5000k's on a freshly rebuilt and cryod box and afta doing sum near on 250km an hr runs the box has developed a mad whine.... admitly the car has 402rwkw atm but still. not blaming the oil could just be a part failure. but just letting u know. sound only developed afta extended periods at very high speeds

[BASHO]

i put sin 75 in mine the viscosity u list isnt wat the bottle has on it it said 75-85.... had it in for 5000k's on a freshly rebuilt and cryod box and afta doing sum near on 250km an hr runs the box has developed a mad whine.... admitly the car has 402rwkw atm but still. not blaming the oil could just be a part failure. but just letting u know. sound only developed afta extended periods at very high speeds

Thanks mate, I think you might find that the 75-85 is a synthetic blend, the labeling is a bit deceptive. The sin 75 is a fully synthetic product and carries 75-90 printed in smallish letters on the lower left side front here's a link http://www.penriteoil.com.au/products/gear...sin_gear_oil_75 the SIN 75 is about $55.95 for a 2.5lt bottle the 75-85 blend is around $28-32 for 2.5ltr, I think , I know I nearly bought the 75-85 just on bucks but decided to bite the bullet as I'd only change the gearbox oil evry 12-15 months as I do bugger all klms.

I changed all my oils today, motor/gearbox/diff and I used the penrite SIN 75 in the gearbox so I'll post if it goes crook. I've got a 98 R34GTT with 80000ks on it which I think are genuine.

I've got a fat exhaust but wont be going beyond a Nistune motherboard and tune when it comes to more mods so it won't be working that hard.

Farkin bad news on the box, what gearset are you using with that much kws ?

[MrStabby]

decided to bite the bullet as I'd only change the gearbox oil evry 12-15 months as I do bugger all klms.

Fully synthetic in a gearbox should be good for 300,000+kms. So no need to ever change it again!

[T04GTR]

sin 75 and sin 80 are hypoid diff oils. not sutible for your gearbox. penrite manual gear 70 is the corect oil.

[T04GTR]

ps. i have about 40 2.5l bottles of sin 80 if anyone wants some for less then retail.(were sponsord by them

[BASHO]

sin 75 and sin 80 are hypoid diff oils. not sutible for your gearbox. penrite manual gear 70 is the corect oil.

Hmm, not acording to Penrite when I phoned them, unless of course I misunderstood which is not beyond the realms of possibility given that I'm an ole fart.

Not doubting you on this but the oil that came out was a deal heavier than 70 grade and its a 5 speed box.

Penrite sez:-

SIN GEAR OIL 75

Synthetic gear oils engineered for maximum protection, life and performance. Use for transmissions and differentials for all types of high performance cars. SIN Gear Oil 75 has been specifically enhanced to survive the extremes of V8 operations.

Exceed API GL-5 and GL-6.

Package and Code:

2.5LSING750025 20LSING75020

AND

MANUAL GEAR OIL 70

A great synthetic performance gear oil featuring new generation technology. Suitable for many modern 6 speed manual gearboxes where originally a synthetic or mineral automatic transmission fluid was specified. Ideal for T-56 manual transmissions and VW/Land Rover gear boxes.

SAE 70W-75, API GL-4 Plus, BOT338

Package and Code:

2.5L MGO70750025

20L MGO7075020

Edited October 3, 2009 by BASHO

[MrStabby]

My dumbass way of looking at these similar oils is;

GL-4 for is best suited to gearboxes

GL-5 for is best suited to diffs

and unless i have a good reason to do otherwise, I use the manufacturers recommended viscosity (so i probably wouldnt use 70W-75 in my gearbox)

[BASHO]

Love the methodoligy.

I have absolutely no idea what the OE spec for the R34GTT gearbox is if you could post it up it would be of great help as after huge searching on here many others don't seem to know either.

After refering to this post http://www.skylinesaustralia.com/forums/Tr...ts-t205993.html I then phoned Penrite and asked them what thier equivalent to Syntrax 75-90 was as I had used Penrite 10/10 which they no longer make and was happy with it , thier advice was SIN 75.

Penrite also didn't have an oil spec'd specificly for an R34GTT manual gearbox as such.

[Shiraz200SX]

i use penrite Sin Gear 75 in my silvia 5 speed, and my differential. but i have a vicous LSD... i'm not sure about skylines though. it's been in there since i had the car, gearbox still feels good, no crunching. LSD still hooks up pretty good.

[BASHO]

OK , the SIN 75 feels way to heavy for the gearbox in my R34GTT the gearchange is sluggish and the selectors work way to hard going from the snick to a clurk noise when changing gear noise , I've hoyed it out and have gone with a straight Nulon 80 smooth shift on the basis that Castrol recomend VMX 80 or VMX 75/85 and I couldn't find any on the shelf on Sunday, this again is a Hypoid which is probably another wrong'n.

I'm going to phone Nissan and see if I can find out what wieght of oil they would put in if they were servicing it , which they won't.

wish me luck

Edited October 5, 2009 by BASHO

[MrStabby]

IIRC 32 GTR, 33 GTR, 33 GTST and 34 GTT gearboxes have pretty much the same internals, with some minor revisions along the way (ie extra syncros on third in series 3 33 GTR). The 32 GTR spec is 4.1 liters of 75W-90 GL-4.

[BASHO]

IIRC 32 GTR, 33 GTR, 33 GTST and 34 GTT gearboxes have pretty much the same internals, with some minor revisions along the way (ie extra syncros on third in series 3 33 GTR). The 32 GTR spec is 4.1 liters of 75W-90 GL-4.

Thanks for that, I actualy found out from Nulon that the spec is GL4 75w-90 , Nissan wouldn't tell me and had no oil to sell me iether, made me feel a bit like Oliver Twist. -More Mr Beadle please sir ?

A bit of perhaps useless infi on gaerbox oil specs according to Oil Mfrs for the R34GTT.

CASTROL--------VMX 80 OR VMX-M 75w-85

MOBILUBE-------XHP 75w-90

NULON----------75-85 full syntnetic SMOOTH SHIFT.

I'm now puzzled why my gearshifting was so heavy if I use 75w-90 was it because I used oil with Hypoids in it ? WTF are hypoids anyway, everyone I ask looks sheepish and changes the topic.

This is of course is intended in the style of Clarkson , Hypoid what is Hypoid is that an oily steroid ? etc

[some_cs_student]

Does this help? hypoid lubricant for read (sic) differential?

Apparently hypoid oils are for hypoid gears ....

[Munkyb0y]

What about Penrite SIN MANUAL TRANS 75-85 in a 33 gtst?

http://www.penriteoil.com.au/products/gear...in_manual_trans

Is it half decent? I think that's what I put in mine with the new clutch.

[BASHO]

Does this help? hypoid lubricant for read (sic) differential?

Apparently hypoid oils are for hypoid gears ....

Thanks, helped mighty, bottom line is that synchromesh gears dont like Hypoid oil hence the syncro drag, for want of a better term, that I am experiancing though as I understand it hypoid oil would actualy be a stronger option wieght for wieght than non Hypoid , also interesting is the fact that GL4 is now considered obselete.

After running around all the local Autobarns, Suercheeps, Repco's etc I found that GL4 75w-90 non hypoid oil is rarer than rocking horse shit, in point of fact I found none.

This may explain why no oil manufacturer specifys 75w-90 , they just don't have it , so they spec 75w-85 or whatever they have thats sorta nearest--how encouraging

Except good ole Mobil who do 75w-90 GL4-------- in 20ltr drums , go to Kingdom OZ to actualy get even that, although I was told somewhere in Burliegh may have it.

I was offered Redline light at $160 3.85ltr bottle by Bursons but have been told that this has a habit of turning to cheese and requires a gearbox rebuild to actualy get the stuff out .

I now have even less of an idea what the best oil for this gearbox woud be than when I started.

[r34unit]

Has any one used penrite pro gear 80w-140 full syn ?

[turboedsloth]

Thats a diff oil.