Oil weight for track only car with a lot of cooling? - Page 9 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

2.2Lude · 03-14-2024, 11:52 AM

Quote:

Originally Posted by autoracer86

If only Redline came in easy use bottles LOL. But yeah MT-90 is another great option

You mean you don't like making a gear oil mess because the transfer pump sucks and leaks either?

+1 for MT-90. I know people like to use Motul gear 300 but the fact that it was GL-5 spec(technically has additives that make it backwards compatible with GL-4 spec transmissions) just didn't sit well with me. Plus MT-90 is nice and smooth for me in my climate even on cold starts.

autoracer86 · 03-14-2024, 01:14 PM

Quote:

Originally Posted by 2.2Lude

You mean you don't like making a gear oil mess because the transfer pump sucks and leaks either?

+1 for MT-90. I know people like to use Motul gear 300 but the fact that it was GL-5 spec(technically has additives that make it backwards compatible with GL-4 spec transmissions) just didn't sit well with me. Plus MT-90 is nice and smooth for me in my climate even on cold starts.

100% this. MTL and MT-90 are both GL-4 and offer what I assume is the same/close levels of performance but in a easy to use bottle well bag in this case lol.

I would give redline a try if they ever update their bottle. Used it back in the day and never had issues after install of course.

GrandSport · 03-14-2024, 01:57 PM

Do we need any additives for the diff?

BTW: this is a track only car in Texas, so cold weather driving isn't really a concern. I can't imagine either oil is cold for more than about 1 minute, the drive from the garage to the grid.

autoracer86 · 03-14-2024, 02:06 PM

Quote:

Originally Posted by GrandSport

Do we need any additives for the diff?

BTW: this is a track only car in Texas, so cold weather driving isn't really a concern. I can't imagine either oil is cold for more than about 1 minute, the drive from the garage to the grid.

Need no... I went with gear 300 LS over normal LS because its a GL-5 only fluid not a hybrid 4/5. Cost is close enough and I don't see how it could hurt

M0nk3y · 03-14-2024, 03:54 PM

Quote:

Originally Posted by GrandSport

Do we need any additives for the diff?

BTW: this is a track only car in Texas, so cold weather driving isn't really a concern. I can't imagine either oil is cold for more than about 1 minute, the drive from the garage to the grid.

Do you have a clutch diff?

If so - yes.

Stock Torsen, no.

GrandSport · 03-14-2024, 04:42 PM

Quote:

Originally Posted by M0nk3y

Do you have a clutch diff?

If so - yes.

Stock Torsen, no.

Yup, stock.

03-14-2024, 01:57 PM	#115
GrandSport Senior Member Join Date: Sep 2018 Drives: 13 Viper; 14 BRZ; 90 Miata; 18 AMG Location: TX Posts: 306 Thanks: 65 Thanked 187 Times in 103 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Do we need any additives for the diff? BTW: this is a track only car in Texas, so cold weather driving isn't really a concern. I can't imagine either oil is cold for more than about 1 minute, the drive from the garage to the grid. __________________ 2014 BRZ: Full track car. Gutted, caged, coilovers, AP enduro, OMP, bolt ons, aero, etc, 2013 Viper GTS : Tractive Coilovers, ACR sway bars, aero, carbon, exhaust, etc. 1992 NA Spec Miata: 1.6 + 1999 NB Spec Miata: 1.8 w/ all the goodies. 2018 GLE 63 AMG: +800hp whistling AWD TT V8 grocery getter 2016 GX460: IDK. Too reliable to sell. Too boring to use.

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