LM 75W90 GL4+ vs. Redline MT-90 GL4...any real difference?

[TiGeo]

This is for my front bevel box and rear diff on my Sportwagen. LM GL4+75W90 is $13/1L vs. the Redline GL4 75W90 at $19/L at FCP Euro. Not sure of the "GL4+ (GL4/GL5)" designation on the LM, as far I can see, I need GL4 for both of my applications. This is for a ~70K/3 year change which will be about my interval going forward. I'm not interested in what I can get locally/Walmart as I like to use FCP and this is part of a larger order for my DSG and Haldex and I can return these later for a refund next change. Also, going to run LM MoS2 for gears in both.

 

[MolaKule]

I would recommend not using any MoS2 in any MT as this is a friction modifier that would compete with the balanced friction modifiers already in the formulation.

Do you have a VOA of the LM GL4+75W90?

 

[TiGeo]

I would recommend not using any MoS2 in any MT as this is a friction modifier that would compete with the balanced friction modifiers already in the formulation.

Do you have a VOA of the LM GL4+75W90?

This is not for a manual trans (I have a DSG), it's for the front and rear differentials. I don't have a VOA for it but here is the PDS from LM:

 

[MolaKule]

This is not for a manual trans (I have a DSG), it's for the front and rear differentials. I don't have a VOA for it but here is the PDS from LM:

Okay, I thought there was a transaxle involved so my misunderstanding. But I still don't see the need for any extra Moly.

We know the chemistry of the Redline oil but not the LM.

 

[XCIDMigs]

This is for my front bevel box and rear diff on my Sportwagen. LM GL4+75W90 is $13/1L vs. the Redline GL4 75W90 at $19/L at FCP Euro. Not sure of the "GL4+ (GL4/GL5)" designation on the LM, as far I can see, I need GL4 for both of my applications. This is for a ~70K/3 year change which will be about my interval going forward. I'm not interested in what I can get locally/Walmart as I like to use FCP and this is part of a larger order for my DSG and Haldex and I can return these later for a refund next change. Also, going to run LM MoS2 for gears in both.

I'm about at the first DSG service on my GSW, I have the oil/filter already, what method have you used for putting the new oil in? I'm looking at one of these hand pumps with fittings just never did that before. I did drain/fill on those "difs" a while ago just using the regular synthetic valvoline GL4 I got locally. I really would like to get on the FCP return train just need to be more organized to really take advantage of it all.

 

[The Critic]

I recently went thru this debacle for the Bevel Gear on an A3 Quattro. I went with the dual-rated Motul Gear 300 75W90.

 

[TiGeo]

Okay, I thought there was a transaxle involved so my misunderstanding. But I still don't see the need for any extra Moly.

We know the chemistry of the Redline oil but not the LM.

Based on your knowledge of the Redline - I take it it's a solid product? Happy to pay a few more bucks for it. Appreciate the feedback on the MoS2 for gears, figured it was a "why not" but I'm kind of in to trying stuff.

 

[TiGeo]

I recently went thru this debacle for the Bevel Gear on an A3 Quattro. I went with the dual-rated Motul Gear 300 75W90.

LM doesn't even list an application on their site for the r. diff, only the bevel box. I emailed them, they said check their oil selector..hahahahaah.

 

[TiGeo]

I'm about at the first DSG service on my GSW, I have the oil/filter already, what method have you used for putting the new oil in? I'm looking at one of these hand pumps with fittings just never did that before. I did drain/fill on those "difs" a while ago just using the regular synthetic valvoline GL4 I got locally. I really would like to get on the FCP return train just need to be more organized to really take advantage of it all.

I use the recommended fill from the bottom method. I have the tool that threads into the drain and attaches to the bottle with a valve for on/off. I snake it up through the engine compartment. Very easy/fast. To go all-in on FCP like I have, you really do need to be orangized. I have a spreadsheet - I've saved ~$600 so far so $1200 spent on consuables for my 3 VWs. A great deal. Fast shipping. Great customer service. No-drama returns/lifetime replacement. I have a video somewhere showing it....I'll see if I can find it and post it to my YouTube channel/link it. I used the Liquimoly DSG fluid before, worked just fine.

 

[TiGeo]

I'm about at the first DSG service on my GSW, I have the oil/filter already, what method have you used for putting the new oil in? I'm looking at one of these hand pumps with fittings just never did that before. I did drain/fill on those "difs" a while ago just using the regular synthetic valvoline GL4 I got locally. I really would like to get on the FCP return train just need to be more organized to really take advantage of it all.

Found it and posted it:

 

[benjy]

for my 2001 TT 225Q i find Redline lubes worth the xtra $$ + found some at 20% off over the holidays. LM is ok BUT not likely a true synthetic like Redline. i even use their engine oil in my small 4.25 qt sump + their 15-40 reduced consumption + shows more vacuum on my in car boost vac gauge. been using Redline for years + never disappointed. their MT90 cured my 5spd O2J in a 2001 jetta until i stripped the 5th gear at 25 lbs boost!!

 

[TiGeo]

for my 2001 TT 225Q i find Redline lubes worth the xtra $$ + found some at 20% off over the holidays. LM is ok BUT not likely a true synthetic like Redline. i even use their engine oil in my small 4.25 qt sump + their 15-40 reduced consumption + shows more vacuum on my in car boost vac gauge. been using Redline for years + never disappointed. their MT90 cured my 5spd O2J in a 2001 jetta until i stripped the 5th gear at 25 lbs boost!!

I think I'm going to splurge on the Redline for the gear oils. The LM DSG fluid has worked well and is quite a bit less than the VW stuff with no negatives I can see.

 

[930.engineering]

This is for my front bevel box and rear diff on my Sportwagen. LM GL4+75W90 is $13/1L vs. the Redline GL4 75W90 at $19/L at FCP Euro. Not sure of the "GL4+ (GL4/GL5)" designation on the LM, as far I can see, I need GL4 for both of my applications. This is for a ~70K/3 year change which will be about my interval going forward. I'm not interested in what I can get locally/Walmart as I like to use FCP and this is part of a larger order for my DSG and Haldex and I can return these later for a refund next change. Also, going to run LM MoS2 for gears in both.

Given the added power and torque I'd recommend using GL-5 in both the bevel box
(it's NOT a diff) and the rear diff. Also, 'GL-4+' does not equal to meet both GL-4 and
GL-5. Actually 'GL-4+' is just a GL-4 with (supposed) added protection levels. Not sure
if LM now carries a proper GL-5. They didn't in the past, however I noticed LM now has
some excellent MTF (GL-4). In the US I'd probably go for RL or Amsoil, since Castrol's
(excellent) fully synthetic gear oils are harder to obtain in NA. For example the Castrol
Syntrans V-FE I used in the GTI's 02Q was shifting as effortlessly as VW's multi-$$$$$
G 052 527 (75W MTF). On a side note, for the VAQ/Haldex I use Ravenol AWD-H fluid.
.

 

[TiGeo]

Given the added power and torque I'd recommend using GL-5 in both the bevel box
(it's NOT a diff) and the rear diff. Also, 'GL-4+' does not equal to meet both GL-4 and
GL-5. Actually 'GL-4+' is just a GL-4 with (supposed) added protection levels. Not sure
if LM now carries a proper GL-5. They didn't in the past, however I noticed LM now has
some excellent MTF (GL-4). In the US I'd probably go for RL or Amsoil, since Castrol's
(excellent) fully synthetic gear oils are harder to obtain in NA. For example the Castrol
Syntrans V-FE I used in the GTI's 02Q was shifting as effortlessly as VW's multi-$$$$$
G 052 527 (75W MTF). On a side note, for the VAQ/Haldex I use Ravenol AWD-H fluid.
.

Good into thank you. Yes, LM lists a GL5 "Hypoid gear oil" now. Redline shows the 75W90 GL4 for both the front bevel box and r. diff.

 

[930.engineering]

.
Yes, but that's for the car in stock shape. Commonly using an API
GL-5 in a diff doesn't hurt. Maybe MolaKule might comment on this.
.

 

[TiGeo]

Given the added power and torque I'd recommend using GL-5 in both the bevel box
(it's NOT a diff) and the rear diff. Also, 'GL-4+' does not equal to meet both GL-4 and
GL-5. Actually 'GL-4+' is just a GL-4 with (supposed) added protection levels. Not sure
if LM now carries a proper GL-5. They didn't in the past, however I noticed LM now has
some excellent MTF (GL-4). In the US I'd probably go for RL or Amsoil, since Castrol's
(excellent) fully synthetic gear oils are harder to obtain in NA. For example the Castrol
Syntrans V-FE I used in the GTI's 02Q was shifting as effortlessly as VW's multi-$$$$$
G 052 527 (75W MTF). On a side note, for the VAQ/Haldex I use Ravenol AWD-H fluid.
.

I used the VW Haldex fluid in the past and was going with Febi kit that FCP sells that comes with the Racingline mag drain plugs. I'll have a look at that Revenol fluid.

 

[TiGeo]

.
Yes, but that's for the car in stock shape. Commonly a using an API
GL-5 in a diff doesn't hurt. Maybe MolaKule might comment on this.
.

From my limited understanding/reading on this subject, seems like GL5 is ok to use in diffs but not in a MT b/c it's "too slippery".

 

[930.engineering]

From my limited understanding/reading on this subject, seems like GL5 is ok to use in diffs but not in a MT b/c it's "too slippery".

Yes, I won't use a GL-5 in most MTs, especially not in VW MTs. It's fine in their rear diffs though.

Oil test analyse AWD-H Fluid

RAVENOL | Oil test analyse AWD-H Fluid

www.ravenol.de

.

 

[TiGeo]

Yes, I won't use a GL-5 in most MTs, especially not in VW MTs. It's fine in their rear diffs though.

Oil test analyse AWD-H Fluid

RAVENOL | Oil test analyse AWD-H Fluid

www.ravenol.de

.

And the bevel box? I just call it a front diff b/c well, it sends power back but I realize it's just an "L".

 

[930.engineering]

.
Regarding oil same as a diff. Not sure it has some kind of offset,
probably it doesn't, so I wouldn't call using GL-5 a 'requirement'.
.