damnit i just bought 6 quarts direct from redline few days ago. i hate u guys. :(

I would be in for 2 oil changes worth as well as whatever is needed to switch out the Transmission ..

I use MT-90 in my 240Z and I'll be putting it in the 280ZX as well. Its pretty much the number one recomended oil for those transmissions (as well as Redline MTL which is slightly lighter). It's crucial that they use the GL-4 as the high presure modifiers in GL-5can destroy yellow metal (bronze, etc) trannys. I don't know if the syncros in the 370Z are bronze alloys, etc. I use the Redline 75W140 (GL-5) for the rear diffs in my R180 and R200s.

That being said what is the cost on the above oils? I'll probably order enough to do my 280ZX and my 370Z but it obviously has to be worth my $$ so shipping as well. If its cheap enough I'll get the 5W30 as well for the 370Z.

0W40? I thought we take 50W30? Or am I absolutely oblivious?

5W30 although with synthetics technically 0W30 would be better (on start up where the most wear occurs). 0W40 would be for a very hot climate.... the flow characteristics of 0W30 and 0W40 at temp are virtually the same.

so lets say for socal (it doesn't get pass 95 nor below 55) would it be best just to use 5w30?

That's what I would recomend. If you are really interested in learning about this stuff spend four to eight hours reading threads on Welcome - there is a lot of good stuff on there and there are a few threads on here about oil.

one day....one day I will devote 8 hours on that web page to read about oils. as of now...I rather lurk around here :D

Lol - good point. I usually spend hours reading stuff like that trying to educate myself on this stuff while the wife watches TV ;)

I want whatever it takes to swap out the rear diff and manual transmission with redline.

Yes the factory calls for 5W30, but for street I would consider 0W30 unless you live in Phoenix AZ. For track use the 0W40 has better viscosity at 220F+ and still has good properties for street use as does the 5W50.

I'll work out pricing and post Monday

Still waiting on that post. :tiphat:

Im in on group buy for MT, Diff and motor oil.

I've noticed the past couple days (~25deg this morning) that getting into 1st gear has been fairly difficult. Come to a complete stop, then let of the brake so I roll just a smidge, and it goes in. Down shifting into 1st from 2nd coming to a fresh green light behind someone is hard as well, even at ~5mph.

From what I can tell, this fluid change will help shifting overall, but do you think it will help this specific problem?

A 2 - 1 downshift while moving will always be difficult to engage. It's something I've experienced with every car I've owned. Fortunately, there isn't a need to be rolling and shift into first for driving purposes...2nd gear has plenty of pull even from 5 or 10 mph. The transmission oil change may help, but super cold temperatures will make shifts sticky until things warm up regardless of the fluid you are using.

Just put Nippon Oil Co's "Eneos" full synthetic fluid in my gearbox. It was a toss up with MT90, but my local rice shop guys suggested I try it. They use it and have been getting good reviews from their customers. Pulled out of the driveway, made the first 1-2 shift and immediately noticed a difference. Drove straight to their shop and bought a few more quarts for the Dif. YMMV

Japanese fluids developed for Japanese cars can't be too awfully wrong..

Nippon Oil

http://www.eneos.us/images/products/bot-MT.jpg

Hmm, I wouldn't put GL-5 in the transmission. GL-4 is recommended. In the diff it would be fine.

Apparently it''s not that simple.....
Seems it has a lot to do with the additive package. More info from Bobstheoilguy:

[QUOTE]I cannot vouch for any lube except ours. In the past, manufactures speced GL4 because of the lower levels of the Sulfur-Phosphorous (S-P) additive package. The lower levels guaranteed less interaction (such as staining and corrosive pitting) with copper alloys such as brass and bronze.

However, and since about 2000, most additive packages now contain "inactive" sulfur which is mediated by metal deactivators and which do not allow the sulfur to interact with the copper-alloy metals, but still allows the S-P additive to protect the gear teeth and bearings.

The problem with most OTS GL5 lubes in MT's is their viscoity and friction modifiers. While the OTS GL5 gear lubes are great for differentials, they do not possess the correct viscosity or friction modification for smooth cold weather shifting.

GL-4; Specified for hypoid gear service under severe service but without shock loading. This classification is essentially obsolete but is still specified by some manual transmission/transaxle manufacturers. Implies an EP/AW additive package that contains 30% to 50% less S-P additives than the GL-5 service classification. Some Marine Gear Lubes fall into this classification, especially the full Synthetic Marine Gear lubes and specialty blenders MT lubes that use high levels of esters.

GL-5; Specified for hypoid gear service but with shock loads and severe service operation. Usually meets Mil-L-2105D and in most cases, is the multipurpose automotive gear oil. Most 75W90 to 75W140 grades meet the GL-5 classification. This grade has a high level of Extreme-Pressure additives that could be mildly corrosive to nonferrous parts, such as brass, bronze and aluminum parts. Most of the modern GL-5 lubes contain metal deactivators that prevents attacks by the extreme-pressure additives. In addition to EP additives, these lubes contain rust inhibitors, defoamants, friction modifiers, thickeners, and Viscosity Index Improvers.[/UNQUOTE]

obviously some usage tests and experimentaion are called for. I'll be the guinea pig.

[QUOTE=Modshack;314874]Apparently it''s not that simple.....
Seems it has a lot to do with the additive package. More info from Bobstheoilguy:

Taking one for the Team :tup:. In for updates

Make sure you update us. :tup: Some good info there. :tiphat:

Yeah I saw the sulfur-phosphorous mentioned on the description page so that is what had me concerned as it is pretty common place in GL-5 oils. I guess you'll find out if the inhibitors due their job :)

Nippon Oil Co. is the largest in Japan. I'm assuming they wouldn't formulate and market this as a transmission lubricant if they hadn't covered their bases. Sure shifts nice!

Steve,

Glad to hear you like the Eneos gear oil. It certainly made my 350Z shift better. I guess I'm going to have to wait until I break my 370Z in to switch. :tup:

I just changed my tranny oil for the second time. Both times with Redline MT90. For some reason the first time did not feel so smooth, it felt kinda notchy. I just redid about an hour ago with the same stuff, now it feels like butter. :driving:

Modshack definately respect your research and info but I'm still leary about using GL-5 in any copper based metals transmissions. Guys on the HybridZ forum have had issue running thier Redline GL-5 stuff in their Nissan transmissions. Know the Redline MT90 is great and it sounds like the second round is even better - most likely because the old fluid is more completly flushed out....

Ok .. so how much would 6 Quarts of 5w30, 3 quarts of MTL90, and 2 quarts of 75w90 come to? If that doesn't go over the $100 mark let me know, and I can just double up on the 5w30.

Anyone else in on the group buy?

did you fill to the same level both times? if so, I bet its just that there is some old fluid mixed in the first time and the combination is not as good.

I guess no group buy is going to happen then huh ...

Group buy is NO LONGER valid since Z1 performance is no longer a supporting vendor. I have been buying from this guy on ebay and been VERY happy.

eBay Seller: morethantires: Parts Accessories items on eBay Motors

He seems like a Redline dealer. I'll ask him to become to sponsor here.

Hey AK...I've too have bought Redline from that guy (morethantires) on several times. See if you can get him on board for a GB.

I sent him an email. Lets see what I get in reply.

just buy it off amazon and save yourselves the hassle of dealing with unknown sellers/vendors. it's only like $9.99 there with free shipping. mine showed up in 2 days.

Sorry guys, good luck

http://www.racerpartswholesale.com
Gear Oil and Transmission Lube

$8.85 flat rate shipping

$9.49 or $9.95/qt depending on the oil

same place where Mod got his oil cooler parts (and where I'm about to order mine). spoken with a couple people on the phone to answer some questions and they've been easy to get a hold of and very helpful.