G50 Transmission oil

[elpello]

I have an 87 Carrera and need to know what type of lubricant to fill the tranny up with? Is swepco 201 OK in these transaxles? If not what does Porsche recommend?

Thanks
Greys

[Wil Ferch]

Swepco would be fine but Mobil 1 Synthetic is good here because of the more normal Borg-Warner style syncros used for the G50 ( unlike the Porsche baulk-ring syncros used for 915).

Wil

[jpachard]

Greys, You will want to use Mobil 1 synthetic in your G-50. Depending on your use, change it every 6 months if driven regularly. If you track the car change every 10hrs. of run time, especially if you have a ZF LSD.

Cheers, James

[Glenn from Denv]

I use Mobile1 in mine.

[kepperly]

RED LINE 75-90 ns, it will make a differance.

Keith Epperly 87 slant nose turbo look carrera cabriolet

[Wil Ferch]

Is this formulation of Red Line rated GL-5?.....most Redlines are API GL-4 ....

Wil

[J Smith]

Will, yes it is.

On this page

[jbrinkley]

has anyone switched from M1 to red line in a g50 non-LSD?
or, for that matter switched from anything to redline?
just wondering if there is a real difference in feel

[TMH]

Originally posted by jbrinkley
has anyone switched from M1 to red line in a g50 non-LSD?
or, for that matter switched from anything to redline?
just wondering if there is a real difference in feel

Big difference. Switched from what was in it (I don't know what it was, but it was blue in color) to the Redline, non-LSD G50. Had been notchy going into 2nd, especially when downshifting. That went away completely.

Recently I have heard from a couple of wrenches, however, that a mix of dino and synthetic tranny lubes is best, and will try that next (mixing Redline in).

Tom

[donstevens]

Has anyone ever tried Amsoil gear lube in a G50?

[alfizzo]

iam going to try that new valvoline syn. gear oil. had mobil 1 last time.

[kepperly]

I went through, dino hypod, mobil 1, redline 75-90 straight and have the Best shifting with Redline 75-90 ns. Car has 87,000 miles and doesn't look to have been taken apart, at least the tranny.

Keith Epperly 87 slant nose turbo look Carrera cabriolet 3.2 g-50

[jbrinkley]

that's what I was looling for Keith, thanks

[M.D. Holloway]

The Mobil 1 will be more shear stable. The synthetics will work fine and be more oxidatively stable. The will also have a higher viscosity index which means they hold their viscosity over a wider temp range. As far as 75W90 or 85W90 - the second number is what you really want to focus on. That is the operating temperature viscosity, th first number has to due with flow at low temps. Not a huge differnece between 75 and 80.

[fastpat]

Originally posted by Wil Ferch
Is this formulation of Red Line rated GL-5?.....most Redlines are API GL-4 ....

Wil

Redline has a pretty nice site with the specs for its gear lubes.