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Author Topic: Favorite Motor and Gear Oil.  (Read 4500 times)

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slazyks

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Re: Favorite Motor and Gear Oil.
« Reply #15 on: April 18, 2012, 08:23:23 PM »
I'm bumping this for opinions.  When I took ownership of my 01 TJ I changed all the major oils...

engine-Mobil 1 10w30
diffs-Master Pro gl5 80w90
Transfer case- Valvoline ATF+4 full synthetic
AX5 tranny- TORCO SGO 75w140

My worry is the transmission oil.  A mechanic who builds off-road buggy's and jeeps recommended it.  I know GL5 compatible oil is NOT supposed to be used but he said this oil does not have the "molys" and additives that wear brass synchros.  I called the manufacturer and they confirmed it is safe to use in transmissions with brass.  I got it for 10 bucks a quart which is half price(the mechanic is a friend).  So anyways my concern is the fact that it is 75w140 and not 75w90.  What exactly is the difference?

I would call him but he is in the Soloman islands on holiday with my parents.
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Offline neale_rs

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Re: Favorite Motor and Gear Oil.
« Reply #16 on: April 19, 2012, 07:37:26 AM »
It looks like you want all synthetic.  Redline MT90 is the most recommended for the AX5.
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'95 YJ, 33 x 12.5 mud tires, RE 4.5 ED lift, Atlas 4 speed, rear D44, ARBs front and rear, 4.56 gears, 8000# winch

Offline aka-justin

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  • Posts: 883
Re: Favorite Motor and Gear Oil.
« Reply #17 on: April 19, 2012, 09:10:24 AM »
Quote from: neale_rs on April 19, 2012, 07:37:26 AM
It looks like you want all synthetic.  Redline MT90 is the most recommended for the AX5.
:thumbsup: X2
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[1995 YJ 2.5L with 4" lift on 31" KM2 - Sold] 1995yj
[2003 TJ Rubicon 4.0L with 4" lift on 35" Wrangler M/T - Sold]
To be continued...
--Justin

Offline Tr00b

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  • Posts: 212
Re: Favorite Motor and Gear Oil.
« Reply #18 on: April 30, 2012, 10:38:23 PM »
I am trying out Rotella 15-40 this oil change... At the end of the oil's life around 2000miles on 10-30 Castrol GTX High Mileage or Mystic Syn Blend, I would start losing oil pressure. If the engine is good and hot and esp when I am offroading at low RPM, the oil pressure will drop low enough for the beeper to go off. Probably not a good sign, but as long as the oil is good and fresh, the pressure holds fine.

Is there an AMSOil equivalent to MT90? I have a great source for AMSOil but not Redline.
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