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If you guys want factual and scientific answers as to what oils are good and safe you should go and ask over on these boards, they are awsome and have data to back up thier answers
http://theoildrop.server101.com/cgi/ultimatebb.cgi

BTW the people over there do not think higly of Royal Purple engine oil because of a few Used Oil Analysis reports on it, but those are not conclusive.

About Royal Purple or Redline having products that could hurt your syncros I think that both companies make gear fluids with Sulfer in it. Sulfer is bad for yellow metals that make up the syncros. The Redline oil that you should use for the Celica is MT-90. I'm not sure about the different Royal Purple oils. I suggest that you ask questions about oil and lube over there. You can get some very educated answers.
 

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00 scrub said:
About Royal Purple or Redline having products that could hurt your syncros I think that both companies make gear fluids with Sulfer in it. Sulfer is bad for yellow metals that make up the syncros. The Redline oil that you should use for the Celica is MT-90. I'm not sure about the different Royal Purple oils. I suggest that you ask questions about oil and lube over there. You can get some very educated answers.
Redline MT-90 is only for auto or manual transaxles without LSD. With LSD they recommend 75w90.
 

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GTSnut said:
75w90 for Royal Purple as well.
Right, but Redline state that their GL5 75w90 is twice more corrosive than their GL4 fluid for normal tranny without LSD.

Royal Purple's fluid that's compitable with LSD contains less sulfur than the Redline counterpart. That's why I will be switching to Royal Purple.
 

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i use Royal Purple in both, engine and tranny oil... i have nothing but high regards for them both... and i plan on to continue using it with my LSD when it's installed along with the car being boosted...
 

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Discussion Starter · #31 ·
nyoneway said:


Right, but Redline state that their GL5 75w90 is twice more corrosive than their GL4 fluid for normal tranny without LSD.

Royal Purple's fluid that's compitable with LSD contains less sulfur than the Redline counterpart. That's why I will be switching to Royal Purple.
Hmmm. Didn't know that about Redline. I think Redline is still a great product, but I am really happy with this RP, and I think you will be too. I don't know how much, if any, difference you will notice since you are going from one great product to another.
 

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Has anyone else used BG Syncroshift? I have that in my tranny. I can definately tell the difference. But don't know how it compares to Royal Purple. I bought a tube of this at a Nissan Dealer and added it to my tranny fluid.
 

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nyoneway said:
Redline is as good as Royal Purple. The reason I'm switching is because I'm getting a LSD and the best Redline fluid for the LSD is corrosive to our bronze/copper synchros but Royal Purple are safer.
i have lsd and was thinking of trying Redline. but since you mentioned it i think ill just wait and stay with amsoil for now.
 

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GTSnut said:


So do you have anything informational about the subject of gear oils to add to this thread? Or just shooting off at the hip about non related issues?
Dude, I was just messing around and pointing out the obvious. How less informative was my post than Immortal's? He laid out no factual evidence of anything just posted a general "i know this guy and he says XXX" statement. Anyone can do that, this is the internet.
Just a little sarcasm that's all......
 

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nyoneway said:


Ok Amsoil rep.

The last thing we were talking about was tranny fluid/gear oil and NOT engine oil?

I take all those Amsoil tests with a grain of salt.
Those test are done by separate labs. Not affiliated with Amsoil. I am not an amsoil rep. I just use the stuff and have for years.

If you don't trust those, Maxima forums has numerous people that have done their own testing.

http://maxima.org/forums/showthread.php?threadid=100060
 
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