Alernative gear oil? Liqui Moly?

[Karaya]

I've read through the gear oil thread. and wish that I had access to Kendall and all the other stuff you guys have been using . I have a 915 tranny. Where I live it's hot most of the time (100 to 110+F) and when it's not hot it's raining. Can one of you lubricant savvy gentlemen take a quick look at this product and let me know if it's a good product? Is this available in the U.S. and has anyone on this forum tried it?

No KendallNo SwepcoNo Brad PennAlmost no Mobil 1

[URL="http://www.liqui-moly.de/liquimoly/produktdb.nsf/id/e_hypoidgearoilsmineralbased_nt000606b2.html"]

Hypoid-Getriebeöl (GL 5) SAE 85 W-140
High-performance high-pressure gear oil which is manufactured from carefully selected base oils and multipurpose extreme-pressure additives.

They also have an interesting full synthetic 10W/60 for racing.

[kidrock]

I believe I remember reading that the 915 gearbox is not rocket science. While Swepco is the most recommended, your best bet may be to purchase the highest quality dino gear oil (not synthetic) you can get your hands on over there. I think the Swepco 201 is 80/90. So why not go with a high quality 80/90 dino? It makes sense.

[Geary]

Can you get Castrol LSX90 ? Generally speaking, the high moly content oils are best for heavy duty industrial use or racing applications in which the normal EP additives are falling short of protecting the R&P. I'd avoid any moly (or 140w oils) in a 915, which has the early Porsche type synchronizers.

[5:04]

I remember reading Motul is pretty good

[Karaya]

Thank you guys for replying. Makes me feel really glad I'm here.

Correction and clarifications to my earlier post...

The 10W/60 is an engine oil (not tranny oil) and says "Racing" on the label. I just threw that in because may be of interest to the others. I've never seen that wide a range before and I'd like to try it on another of my cars first before putting into my Porsche.

The 80W140 tranny oil is pure dino. The multi-viscosity appeals to me but maybe I should test it first or at least see if the dealer and I can determine if there actually is an moly in there. You guys want feedback?

Wouldn't the inclusion of moly into a lubricant make it move toward the "semi-synthetic" line up?

There are good 85/90 gear oils in this line so using Kidrocks suggestion is very doable.

Motul I've found out is a hit and miss thing. Their engine oils are pretty good but their brake fluids are really bad. Boiled it once during a track day (not using a Porsche) and only in about 4 laps. Replaced with a cheap gas station DOT-3 and it worked better than the Motul. This makes me very careful when choosing a Motul product.

Looking for a specific Castrol product here is like looking for the Holy Grail. Not all dealers have the same items and when asked they always say "don't know". But I'll put my boys on the quest for the LSX90.

Thanks for replying.

[Boxer Boy]

We have had a mixed reaction here in the tropics with both Castrol and Motul products. The Motul (600) brake fluids are undependable on the track. There are better oils out there. Castrol oils get really runny, they don't seem to hold their viscosity well in our tropical heat. We have had excessive smoke emissions issues with turbocharged cars.

We have had excellent results with Liqui-Moly lubricants. I am using fully synthetic oil on my Porsche with the Ceratec additive, and it runs great. I will not hesitate to use their gear oils on my Porsche tranny.

[Karaya]

Boxer Boy! Where do you get your Liqui Moly?

[Geary]

Ricardo Engineering, a top transmission designer/manufacturer, has quietly recommended Castrol LSX90 (a NON-synthetic gear lube) in its race transmissions for some time. I doubt that this dino oil will turn runny on you (like many synthetics will). For a 915, it's a better choice than a moly-based or synthetic lube.

[scottrx7tt]

I use castrol hypoy-C which my local Porsche dealer said they used. Works good for me

[Karaya]

Thanks to all that have replied. Great info from everyone.

[wildcat077]

Karaya,

I've been using Quaker State 75w140 Synthetic gear oil for the last two years in my 89 ,over 15,000 kms so far and i'm very pleased with it.
Being that the climate is not as hot in Canada as where you are,it might be even more suited for your application.
I just checked my gear oil last week and it still looks like new ...

Cheers !
Phil

[Karaya]

Thanks Phil but we also do not have Quaker State in this part of the planet.

Also you'd have the G50 and not the 915...right?

[wildcat077]

Yes my 89 uses the G50 gearbox,but then again it's all about what works for you ...

Stuck in traffic in 30C weather,i prefer to have 75w140 that is not at the breakdown point yet as compared to 80w90 that is like water ... lol
There must be somebody you know on another part of the planet that can send you
a case of the good stuff ???

Cheers
Phil

[Karaya]

Hi again Phil,

Maybe I'm just being over careful since this is my first (and probably my only) 911. I'm pretty sure there's something I can use here which just entails first finding it, and then testing it hopefully without anything destructing. Bringing in stuff like oils requires too much customs paperwork.

I like everyone's suggestions but I'm leaning towards and I'm still looking for the Castrol LSX90 (a NON-synthetic gear lube) which I believe may work. In a pinch I can use a Liqui Moly non synth and just change it often.

Thanks for the reply.

Karaya

[enjefriy]

Hi Karaya,

I have been reading about castrol not being to good in this forum.
However just like you, the recommended stuff are simply not available in Brunei.

My 82Sc had some problems with shifting. Previous oil used unknown.

After lotsa research, i gave up and simply looked for Dino oil with the required GL-5 specs etc.

Came down to using the Castrol.
Behold no more hard shifting. Behold, no more metal grinds on the Magnetic plug.
Temp here is the same as Phillipines.

However, Castrol omes in two guises over here. That manufactured in England, and that in Malaysia.

No insult intended, but the Oil shops says stay away from the Malaysian manufactured ones, which has been givin Castrol Quality a bad name.
I have no idea of any truth in this. Simply relaying what i was told.

Stuck in Castrol Gtx 20-50 in the engine SL spec if from the UK.
So this is untested. I'll let all know once i see if it goes runny.

As for Moly, the science is good. Never used that specifically, but did used similar made by elf.
No more stockist of this anymore, hence my try with Castrol.

Anyway with the Moly-Graphite from elf, the engine actually sounded quiter. Did so with my e30 beamer as well.

So for our part of the world, the Moly comes highly recommended. Alot of off road guys here swear by them. No Overhauls, no overheats, just liqui-Moly they say.

Just my 0.2 cents.

[Karaya]

Hi enjefriy.

Thank you for letting me know about the Malaysian made versus England made Castrol products. Is it obvious on the packaging? Does it state somewhere on the container that where it is made? Maybe it states something like made in Malaysia under license from the U.K. or something? Please let us know.

You'd think that a big name like Castrol would ensure their quality.

Thanks for the warning.

Karaya

[enjefriy]

Just check the Label for manufacture country.
Also the Container used by the UK manufactured ones comes in the easy pour plastic can.

As for the oil itself, the UK oil seems a little thicker, and the colour is definitely not the same. I can't remember which, but one was brighter than the other.

If you do go with the liqui-moly, please give some feedback if you may.

I noted lesser valve noise, and ever so slighly cooler oil temp when i had the Moly-Graphite by elf.

I am contemplating the liqui-moly too.
Before getting the 911sc, Gas engined kyosho RC's was my only hobby.

Superten's modified with a 1/8 OS engine. was the latest thing i did.
Namely modified the little beastie to see what i could do against the more expensive Italian kits.

To cut the blabber, i started breaking components. Namely diffs, drive shaft, the Gearbox. I was able to sort all out except for the diffs. It couldn't hack the greater than 1.2 Hp my little engine was putting out.

Having access to commercial aircraft lubes, i thought why not try Molybdenum desulphide. Used on high pressure applications, and could it possibly sort my premature diff failures.

And it did. Mixed all sort with Moly. Fantastic.

My little experiment was not, and is not scientific. Doesn't mean its good for your car. But it just makes me wonder about the properties of the stuff.

Moly and Graphite are great lubes. Whether it is good in the environment given by an internal combustion engines, I donno.

Seems most users here are off roaders. They say off roading doesn't get much airflow to the engine, and a lot of reving whilst maneuvering in the Hot Humid Harassing terain of the Borneo jungle does demand alot from the car's oil.

So according to them, Liqui-moly that u speak off is the only oil to use.

Whether it can be good in our air cooled porsches, again I DONNO.
But would like to hear from you if you go this route.
(I am pro German engineering, hence biased).

As for the Castrol, i haven't had problems. But then again, don't compare my feedback to the guys in this forum. They track their cars, and throw em about on a track. Much more severe use compared to mine.

[enjefriy]

p.s, when's the next Kyosho competition in the Phillipines.
Filipino's are big players in the kyosho scene. As that the Indonesians.
The major competition venue in Hawaii if i remember correctly.
(Sorry for side tracking everybody)

[Karaya]

enjefriy,

I have also experimented with moly oil in 2 stroke applications when I was racing go-karts (many many years ago) with excellent results. It was fun answering the question of why my fuel was black. I confess that I do not follow rc car racing here. I did once fly rc airplanes in competition but that was also many years ago.

I will definitely let you and everyone else know what happens if and when I try Liqui Moly. There is a new certified distributor here that I still have to visit. I tried to call but a salesman answered and he did not understand the technical question I was asking. So a personal visit is in order. He did say their stock was extensive but we'll wait and see.

Meanwhile I'm waiting for my 77 to come out of the paint shop and for my shipment of parts from Pelican to arrive. But it shouldn't be too long now.

This forum is great and I'd like to thank everyone...again.

Karaya