Wow!!! what a diffrence!
 

Thanks to this forum and lots of knowledgeable people,who recommend synthetic gear oil,instead of swepco 201 for G-50 transmissions ,I replaced the swepco gear oil which I, changed in early January of last month , to Red Line synthetic 75W90NS. I just came back from test drive and I gotta tell you guys,it really made a huge difference in terms of the shifting and how smooth and responsive it is now.I love it!
Thanks guys for your info.
By the way I drained the swepco directly from the transmission back to its original container(which I bought from our host) ,it has roughly 500-600 miles on it,and I really hate to dump it ,its practically clean as brand new,so if any body wants or could use it for their 915's, let me know, and I'll arrange for local pick up .I live in valley.

Cheers!!!



1988 targa.

On my 1977 911s Targa the results were the opposite. I took out Redline and put in Swepco years ago, all for the better.

I guess the 915 likes Swepco and the G50 likes Redline?

PM sent. I live in the Valley too.;)

Yes, Swepco 201 is for the 915 (though now there is a Kendall alternate) and any of the top synthetics for the G50. That's always been the case.

Pm sent for the swepco pickup.

yeah, swepco isn't the best for the G50. I also recently drained the gear oil out of my G50 that the previous owner put in, did it because I felt like the shifting wasn't quite what it should be. When I drained it, it was the characteristic blue of Swepco.

Redline is good stuff, I use it in my BMW, Ferrari and others.

But I like Mobil 1 Delvac 75W-90 synthetic gear oil for the Porsche G50 even better.

I just run my swepco through a coffee filter paper before re-using :)

Really? That sounds risky.

and like it would make for some pretty bitter coffee the next morning.

And a very distinct aroma:D:D

G50's like the synthetics....

G50's do like synthetic..

I did my research and settled on Castrol Syntec 75w90 for my G50.

It was inexpensive, easy to get and had average to very good performance in all areas. I feel it's a good compromise for a road card. It shifts great, I think the PO had put swepco in the G50.

Yeah, thought the jokes would come ;)

Peter, swepco has a huge life expectancy in a weekend driver where it's not abused. I'm reliably informed it's quite safe to carefully drain it into a clean container to do whatever works needs be done inside the box, and to put it back in when finished. A coffee filter paper just takes out any fine synchro sludge.

Masis, thanks a million for the "pay forward" gesture! It was nice meeting my first Pelicanite, especially one bearing a gift! ;)
Let's definitely get together and ride the Crest Highway when it is re-opened!

what do you guys suggest for a 901 5-speed?

---

Tom '75 targa

What about a 930 4 speed? Have swepco just haven't put ti in yet

I have been inspired. I picked up some Red Line yesterday and will make the switch today.

I'm interested in replies about gear lube for 930's as well.

Swepco 201 for 901, 915,and 930

synthetics for G50's- Castrol, mobil, redline, etc

What about Swepco 210? Someone recommended it to me for a 915 with a Guard LSD. It may have been Paul Guard that did so.

It's rainy and wet outside today.

Question: Is it a "must" to warm up the transmission before I drain off the old fluid?

I have swepco 210 in my 915. It's better in colder climates, I've been told.

Works great !

I've read a lot of posts on this synthetic rather than Swepco for G50 transmissions deal.

Having had my synthetic changed for Swepco, a few months back, I've made these observations for my 1989 Carrera 3.2 :

1) With the synthetic in the car when I bought it (changed three years ago) I had a fourth gear "bump" in the lever and fifth gear whine on the highway.

2) With Swepco just installed, I had INITIALLY a slowed shift into second when cold, and no difference in fourth and fifth gear. I was worried that "new Lamborghini gear oil" and "935 racing tranny fluid" wasn't going to be good enough for my old 911! :confused:

3) AFTER a month of use, the slowed cold shift into second was GONE, the fourth gear "bump" is GONE, and the fifth gear highway whine has virtually disappeared. Swepco has subjectively restored my G50.

My conclusions after reading all these threads on Pelican on synthetic transmission oil vs Swepco in G50 are this:

1) Almost always I see that people who put Swepco into their G50 and complained never gave the oil a chance to really work its way in -- and displace the existing film of oil that already existed on the gears and synchs. Remember, it's really worked in there. Nooks and crannies, right down to pores in the metal.

2) The idea that synthetic oil works magically better with the G50's gear metals than Swepco makes no metallurgical sense. Unless somebody can prove otherwise?

3) I always seem to read about some "miracle" test drive right after the transmission fluid change to synthetic and raves about what the synthetic has done in just a few miles. Sounds really subjective and unlikely. See point 1 -- these things take time to pan out.

Anyways, that's my experience. I wouldn't hesitate to use Swepco in a G50.

Screenwriter, the real issue is putting synthetic oil into a 901/915 as the synthetic is too efficient (too slippery) for the old school synchronisers (pre G50) to work with.

Interetestingly enough, I've heard the exact opposite, that Swepco 210 is better in hot climates, because it's thicker and holds up against the ambiant temparature better. Living here in Texas, where summer is routinely over a 100 degrees, I was told I should be using it over the 201. I am going to go do some more research...

I was told that a 915 runs cool in hot deserts so 201 is perfect on a street car.

210 is for hot track use when the tranny experiences a lot of work

Screenwriter

There are differences in Mobil 1 or other synthetic purchased at the local flaps is not the recommended oil to use. The recommendation for synthetic comes from Porsche with the latest factory fill is Mobil Delvac 1. Wayne Dempsey's book also refers to using synthetics in the G-50 and later transmissions. Have read about good results with Redline and Amsoil too.

I have changed my the oil when I first got the car with standard Mobil 1 and again when I had the engine out for a rebuild. Then the beginning of last summer put in the Delvac Mobil 1 and the trans is quieter and smoother than before. I was fine with the way it was operating before. Gear oil changed three times in 20,000 miles.

I see no problem with the use of Swepco in the G-50 and is against what I have read over the past 7 years of being here. And most who have switched to synthetics have seen improvements:cool:.

G50? Nuttin' but the Mobil One Delvac, for me......proof's in "my" pudding.....

Good stuff,..and my staunch selection....fluid is changed, frequently.

Best,

Doyle