Thanks Zoom--good info.
Since i am installing an 09 trans in mine this week--i want to start out with the right stuff
I believe i will start out with a true gl-4 -- the redline MT 90. Maybe by the time i have a few for miles on it, there will better choices out there in a heavier viscosity (90w/140).
Is Redline shockprook oils GL 5 rated?
OD

 

Well yea but:
United Kingdom
Cyprus
Georgia
Serbia
Hungary
Romania
Russia Federation
(West region from Ural Mountains) ,
Ukraine, Moldova, Kazakhstan


Thats not exacly the part of Europe that i was thinking of ;P
Still the closes one seems to be in the UK but that doesn't help much either, i sill have to order it -.-

As for the GL-4 oil well.. all oils that i was considering to use were GL-4 and G-5 spec.
I assume it will be kind of hard to find a good, only GL-4 oil.
Anyone can reccomend any ?

 

Redline is the only one I know off that is readily available in stores?
OD

 

The Motorcraft product is available in the parts department at Ford dealerships. Below is their published info about the product. It is not GL-4 or it would say so on the bottle. It is also a Group III oil and everyone knows the arguments surrounding that being referred to as "full synthetic".

Ford Motor Company. Motorcraft ® oils are made with the finest base oils and refined using a revolutionary process known as " hydrocracking ". The result is a base oil that’s so pure, it’s crystal clear. These oils dramatically outperform and outprotect standard solvent-refined oils.

Motorcraft® Full Synthetic Manual Transmission Fluid is a premium-quality SAE 75W-90 gear oil designed, engineered and recommended by Ford Motor Company meeting warranty requirements. It is particularly recommended for MTX-75 and IB5 transmissions, and is also recommended for older transmissions including rear wheel drive that recommend GL-3 and GL-4 type gear oils Motorcraft® Full Synthetic Manual Transmission Fluid is manufactured with synthetic base oils and performance additives providing improved gear shifting at all ambient temperatures. Its wear protection extends the life of synchronizers and bearings Due to its excellent thermal, oxidative and shear stability, this fluid meets Ford’s fill-for-life requirements. Reduced friction and optimal lubrication reduces operating temperatures, increases component life and improves efficiency

Bottom line for me is Redline. I do not want to put Marvel Mystery Oil in the gearbox. No data, no purchase, There is always a reason if the manufacturers use doublespeak in their marketing literature. Statements like this "and is also recommended for older transmissions including rear wheel drive that recommend GL-3 and GL-4 type gear oils" are transparently misleading. Either it is in spec, or it's not.

 

sounds like its actually probably a fully synthetic GL-5/MT-1 spec lube but they are avoiding saying it so they don't have to explain what we're going thru in this thread.

 

and isnt it kinda expensive?
OD

 

My transmissions never last long enough to matter

The only time I ever had a synchro issue is when a large piece broke off an inner cone section for 3rd gear, otherwise I never experienced the grinding issues that get posted here. Generally my transmissions shift superbly up and down at will up until the point 2nd gear blows out ... Which has been on both GL4 and GL5 oils

 

just replaced my Redline with BG Syncroshift II. So far, so good. I really like it. Gone is the little upshift grind (higher RPMs) between 1st and 2nd. Knocks wood

 

Yup. It was $18 a quart at the local Ford dealership.

 

Denny,

Have you got the End plate or Filler Plate for your 09 Tranny???

https://www.rx8club.com/showpost.php...&postcount=139

 

yep --we do.
OD

 

found this? may help some--i didnt realize that the syncromesh stuff was a gl 4 oil. but its too thin for me.

Current MTL GL4 viscosities are:

1. ATF viscosity Series; 6.5 to 8.5 cSt (Equivalent ATF viscosity; Note: ATF additive package is weak compared to most GL4's)

2. Synchromesh viscosity Series; 9.3 - 9.6 cSt (such as Amsoils MTF, Texaco's MTL, Pennzoil's Synchromesh, GM and Chrysler's Synchromesh)

3. 75W85 viscosity Series; 9.8 to 11.5 cSt ( Redline's MTL, RP's Synchromax LT, Nissan's MTL, Honda MTL, Castrol Syntorq LT)

4. 75W90 viscosity Series; 12.8 to 14.5 cSt (Amsoil's MTG, Redline's MT-90).
od

 

So, if GL-5 is becoming the market default, what is the deal with transmissions that just specify GL-5? They have no yellow metal in them? What do they make the bearings/bushings/synchronizer rings out of? I always though bronze was a superior metal for this type of thing because of its affinity for holding oil. Are non-yellow-metal components just as good? Better? Is it uncommon for transmissions nowadays to be using yellow-metal parts?

 

Aluminium-bronze compounds normally, much harder wearing, sometimes a kevlar/steel weave, seen some sintered ceramics too recently

 

Redline MTL is a 70W80 oil

 

You will have to change out the shifter to the '09 and the reverse light plug is different also.

You probably already know this, but I felt it best to mention it.

 

Black Halo Racing has gotten our next GL-5 Eneos sample back from blackstone. The results? Leave the oil in for another 8,000 miles!

BHR Eneos Report

So lets continue arguing about how this stuff is destroying my transmission.

 

funny i don't remember arguing about Eneos lube? i remember saying I emailed Eneos for more information about their particular lube. I also remember you giving incorrect information about GL-5 lubes which you have since corrected in your later posts. Where's the argument?

 

As Denny would say "just 'saying".

Currently the Eneos is my only focus and I would happily test any other GL-5 oils if we ever had them to our inventory. I'm just happy to show that there is at least one GL-5 on the market that is manual transmission safe.

 

good info flash
look at the moly!
od

 

What is the story on "1/2 quart of make-up oil"?

 

It was probably closer to a 1/4 quart but I had to add makeup oil because of the amount of oil I took as a sample. I used a rather large tube and the pump holds at least an ounce or more of oil.

It was just a topping off.

 

Hello.

I beg your help on that one. I have to service my Rx8 and I need new tranny and diff oil. Following BHR's recommendation I've searched for the Eneos but it seems no one is willing to ship them to my country (Spain, Europe). Even european dealers won't ship it and unfortunately there is no official Eneos dealer in Spain.

Still worse, customs in Spain are very picky now with things such as oil, considered dangerous goods. So it is probably no RP, Redline, Amsoil, BG and other stuff I've read here for me.

I have the possibility though of buying the Motul Gear 300, and probably the Mobil1 that I've seen referenced too in the gear oil threads I've been reading.

Can anyone comment on those? I have the Motul in my other bella (Alfa GTA) so far without issues, but only had it for 6k miles or so and it has an open diff next to the tranny (FWD).

Specifications for them are:


Motul Gear 300 75w90
Viscosity grade SAE J306: 75W-90
Density at 15°C (59°F) ASTM D1298: 0.900
Viscosity at 40°C: (104°F) ASTM D445: 72.6 mm2/s
Viscosity at 100°C: (212°F) ASTM D445: 15.2 mm2/s
Viscosity index: VIE ASTM D2270: 222
Flash point ASTM D92: 200°C / 392°F
Pour point ASTM D97: -60°C / -76°F




Mobil 1 Synthetic Gear Lubricant LS
SAE Grade: 75W-90
Density@15C kg/l, ASTM D 4052: 0.859
Viscosity, ASTM D 445
cSt @ 40ºC: 106
cst @ 100ºC: 15.2
Viscosity Index, ASTM D 2270: 150
Flash Point, ºC, ASTM D 92: 175
Pour Point, ºC, ASTM D 97: -46



As a reference, ENEOS Premium Multi Gear 75W90 specs are:
SAE viscosity grade: 75W-90
Density (20°C), g/cm3: 0.8834
Kinematic viscosity
(40°C), mm2/s: 79.9
(100°C), mm2/s: 14.6
Viscosity index: 192
Flash point (COC), °C: 204
Pour point, °C: –42.0


Am I doomed to syncro failure over time? Is any of those two "soft metal friendly"? I suppose I can buy some crappy Agip GL4 or something similar over here. Would that be better than those GL5/4 oils?
If GL5 is ok, which one would you go, Motul or Mobil1 ?


Thank you very much in advance for your help.

 

Just a quick question, how much of each Transmission and Diff fluid should I get? Will 2 quarts of each be enough?

 

Yes, the trans will use almost all of 2 qts and the diff about 1.5