S2000 Under The Hood S2000 Technical and Mechanical discussions.

Diff oil to use in AP1?

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Old 10-03-2006, 02:42 PM
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Thumbs up Diff oil to use in AP1?

My AP1 has 67000 miles on it, I changed the diff fluid when I first got it at 45000 miles with royal purple synthetic.

What brand of diff fluid do you guys run and how often do you change it? (I don't track the car, but I do "get on it" 1-2 a week)

I read all the diff fluids posts, but couldn't find a cut and dry answer.

BTW, my rear is all stock, no mods.
Old 10-03-2006, 02:55 PM
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460cidpower Posted on Oct 4 2006, 12:42 AM
I read all the diff fluids posts, but couldn't find a cut and dry answer.
Too much info & opinions makes it hard to make up your mind.
And you are asking for even more info & opinions?

A good cut and dry answer is in your owners manual:
Hypoid gear oil, SAE 90, GL-5.
Old 10-03-2006, 03:40 PM
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You mean Honda brand? I went to 3 different dealers, none of them carry Honda brand.
Old 10-03-2006, 03:50 PM
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Originally Posted by 460cidpower,Oct 3 2006, 03:40 PM
You mean Honda brand? I went to 3 different dealers, none of them carry Honda brand.
LOL, thats cause honda doesnt have a diff oil for the s2k! your best bet(depending on what climate you live in) would be to go to hardtopguy, pick up some LE-607. its a straight 90 wieght and probably THE best stuff you can have in your diff....BUUUT....if your living in some below freezing temps, i'd skip it and just go with some 75w90 mobil one, the easiest stuff you can find, and know plenty of s drivers with this. but like stated above, honda recommends a straight 90 wieght.
Old 10-03-2006, 04:18 PM
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75W90,GL-5,gear oil.
I use Redline.
Old 10-03-2006, 04:37 PM
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Originally Posted by FISH22,Oct 3 2006, 06:50 PM
LOL, thats cause honda doesnt have a diff oil for the s2k! your best bet(depending on what climate you live in) would be to go to hardtopguy, pick up some LE-607. its a straight 90 wieght and probably THE best stuff you can have in your diff....BUUUT....if your living in some below freezing temps, i'd skip it and just go with some 75w90 mobil one, the easiest stuff you can find, and know plenty of s drivers with this. but like stated above, honda recommends a straight 90 wieght.
Wrong...Honda does have a GL5 gear oil... Its Hypoid oil for the motorcycles, it is approved for the S2k rear diff

http://www.honda.ca/MotorcycleEng/Accessor...400-CA66928.htm
Old 10-03-2006, 05:17 PM
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I use 75w 90 Red line
Old 10-03-2006, 08:52 PM
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i use mobil1 myself. As long as it is a GL-5 it should be fine.

I think there is GL-6, but I can't remember if that is better or worse.
Old 10-03-2006, 09:04 PM
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I use BuddyClub 75w-140 since my car is track car.
Old 10-04-2006, 12:51 AM
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460cidpower Posted on Oct 4 2006, 01:40 AM
You mean Honda brand? I went to 3 different dealers, none of them carry Honda brand.
Not necessarily.
As mentioned by others here, the Honda Automobile devision doesn't carry a hypoid gear oil.
Honda Marine does.
In exactly the right specs.
Or the motorcycle devision, as mentioned.
And there are lots of other brands that carry a GL-5 gear oil, most of them are multy grade.
There have been good results with them too.

Personally I use LE-607.
Comments about not using it in low temps should be considered.. allthough Road Rage mentioned it flowed very well (and better then others) for a straight 90 weight. His words were :"Arctic use is out".. not just some low temps every now and then IMO.


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