Curiosity for the Oil Stupid
 

Hey Gents (And Ladies),

I've not been able to keep up on my information for differential oils for a MT fr-s. I know there are some pretty awesome oil guru's on this site and sadly, because I am at work, I don't have access to much of the website.

sorry if this is a repeat question, But what is a good Differential oil to use in these vehicles for an OFT tuned, DD, located in the South West united states climate?

:thanks:

Motul 300.

/thread

Perhaps I was too vague. I am familiar with Motul 300, Redline, Pentosin, ect. More specifically I am asking for recommendations which include the Why.

You, for example, are in Southern California. Having lived there for years, at your most inclimate (We will include this year where it actually snowed) it peaked at a low of 23* F. This being said, none of the snow stuck and the temp changed 50+ degrees that day. Assuming you live in-land, in places such as riverside, you'll see peak temps closer to where I am living now (Arizona) in the area of 110* F. Here in Arizona, I see similar climates to those extremes. with peak lows of 18*F in winter and peak highs of 118* F in summer.

Clarification to the question: Knowing Motul, under cold conditions, will run thick, And, under high heat conditions, run thin... Is this still a good oil and why?

Additional information: No mods to the vehicle but I have every intent of track-day play with the vehicle, and OFT to be added, and other mods to be added to the vehicle (all N/A, no E85 for time being -- which will change the oils in the vehicle). Current mods, intake and over pipe

Running Motul 300 in both the transmission and differential up here in the tundra.

The dreaded 2nd gear notch was noticeably improved for me after the initial swap. Even at -25C it's still notchy at first if you aren't careful. During the summer I went to multiple track days and never saw any issues.

I'll be doing a full swap again before this year's track season.

Thank you. Appreciated.

Considering you see those high temps I'd stick with something "thicker" like the motul 300 and just take it easy when it's first warming up on the colder days.

Motul Gear 300 LS. It's the one made for LSDs.

I know, we have a Torsen LSD (hypoid gear) so you can use the regular Gear 300, but I've used both and the Gear 300 LS seems to work better, the LSD is quieter (I had chatter with the regular Gear 300), and the LSD seems to engage smoother.

This. This right here is valuable information for me. Thank you very much.

^need second opinion on that statement.

We here in NY/NJ install the Gear 300 across the board for our 86 customers. We have a relatively large sample size and go through probably 300-400 gallons of Gear 300 a year.

With that said, using the Gear 300 75w90 in both our own street cars as well as our heavily tracked BRZ we have seen no issues with it and the advantage is that it is both a GL4 and GL5 so you can use the same fluid in both trans and rear diffy. If you use the LS version make sure you don't inadvertently put that into the Trans as it is not GL4 rated.

Our service interval is 30k miles for our clients and yearly for our track vehicles. Given the stop and go nature of our driving here in NY/NJ the heat buildup in the summers is probably close to or in excess of what you will see in the Southwest.

Hope that helps. We also sell 4 Liters of Motul Gear 300 for $85 shipped, just shoot us an e-mail or PM.

-Mike Paisan

http://www.pbase.com/paisan/image/153798190.jpg
Maintaining, Modifying and Educating TriState Enthusiasts since 2001.
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Sure. Go to motul.com , lube advisor, choose the BRZ, and see for yourself.

See my previous post:
http://www.ft86club.com/forums/showp...0&postcount=13

The links in that post:
http://www.ft86club.com/forums/showp...27&postcount=9
http://www.ft86club.com/forums/showp...6&postcount=12

<-- oil stupid here.

I've read quite a bit but never found a consensus on recommend oil weight for those that daily and track while NA with and without an oil cooler.

I am in your shoes so don't quote me on this, but the vast majority of the articles / threads / propaganda i read suggests that 75w90 is the best. There is a high recommendations for motul 300, 300v, and 300 LS as common types of motul used as well as several other types of fluids which can be used.

Cautions I've read: Motul being used in transmissions, when cold, is very thick which may make the vehicle fell notchy or hard to get into gear (especially 2nd). Recommended break in period of Oil: 3-5,000 miles. After this point it should be smooth around according to some of the PMs this has been affording me.

Additionally, in places like my climate, the oil can become thin in high heats over long term use. Remedy seems to be changing the fluid a little earlier (around 25,000 miles) to ensure it doesn't cause issues.


** additional information **
Motul is currently the number 1 recommended on this forum in terms of how many users are there, but it is not the only one. For vehicles with a dedicated track use, it may not be for us... but i know there was a section of UoA's done on the vehicle I read last night which showed Motul absolutely did the job and held up.

After several weeks of reading (I think I am at 5-ish now), I have decided on the following fluids for my car:

Differential: Motul 300 (LS if I can get it) - In a differential it seems to have a solid reputation and UoA's to back it.

Transmission: Pentosin - Expensive but the UoA's I've seen under high heat stress have been solid and promising.

Engine: Redline 0w-20 (high rpm) - This is the oil I have access to locally for a relatively in expensive purchase price and I have a gift card to the store that sells it. If I have to change it early (I am expecting 5,000 miles) then I'm not terribly bad off. I have also been considering Royal purple which was solid in my 07 impreza, but seems to have moderate reviews in the FT86.

Hope it helps,
Jeff