Subject	Stick with single chemistry the manufacturer designed>>
Posted by	ZUL8TR on January 05, 2013 at 3:38 PM
	This message has been viewed 238 times.
In Reply To	Manual trans oil mixing question (shockproof and MT-90) posted by AHos(Chicago) on January 05, 2013 at 10:40 AM
Message	the Z trannies need a GL4 gear oil with a low corrosivity gear rating to keep the soft metals (synchros) from corrosion of the high pressure chemicals put in gear oils. I have tried many like Amsoil, Mobil 1, Redline MT90, Royal Purple max gear, Valvoline. All synthetic 75w 90, best for me was the Royal Purple been using for past 12 years provided the smoothest shifting and very quiet gear box. Redline MT90 was second best for me. Mobil 1 and Valvoline were the worst for me. Don't know about the shock proof. Note Royal Purple has a GL4, GL5 rating but with low corrosivity so approved for manual synchro trannies requiring a GL4, got this straight from their chemist and test dept. Also note that each tranny is different and they have their gremlins and some gear oils work better than others. Just make sure the corrosivity is low and my 12 years with it proves the point. ZUL8TR in Orlando,FL
Follow Ups	Manual trans oil mixing question (shockproof and MT-90) - AHos(Chicago) 10:40:58 01/05/13 I know this doesn't answer your question, but I like Amsoil - TriniTT 11:43:07 01/05/13 at the same price as redline, I'm going to try this out - AHos(Chicago) 15:58:37 01/05/13 this is what i use in the z and my wife's G35.good stuff. (n/m) - slayer fan 21:10:41 01/05/13 sorry I can't be more helpful but I recall people having - PiotrC70 14:16:57 01/05/13 My syncros are already on their way out... - AHos(Chicago) 15:55:02 01/05/13 I thought I was going to have to replace mine too. - TriniTT 19:41:34 01/05/13 Stick with single chemistry the manufacturer designed>> - ZUL8TR 15:38:50 01/05/13 I think I'll take your's and TriniTT's suggestions. - AHos(Chicago) 15:58:06 01/05/13 When I tried the Amsoil the one noted by TrinnT was >> - ZUL8TR 06:06:55 01/06/13 I did a redline transmission 'cocktail' on my last change... - ZinnZ32 16:25:33 01/05/13 Why? Not enough options without concocting a mixture? - ConVerTT 16:34:04 01/05/13 It's more common than you think. That's why I asked about it - AHos(Chicago) 17:52:09 01/05/13 While the MT-90 is good, I want the film protection of SP - ZinnZ32 18:51:48 01/05/13 fwiw, although on the $$$$ high end, - TTZEDHEAD 20:30:06 01/05/13 what were the specs (name, etc) and can you get it online? (n/m) - genic 21:55:28 01/05/13 Do you know if it's a GL4 or a GL5? And what weight? - AHos(Chicago) 10:28:00 01/06/13 I prefer Motul 80w90. Details inside - ztunerz 09:14:51 01/06/13 We use Motul Gear 300 with great sucess. - Joe@ZSpeedperformance 14:34:54 01/07/13
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