Oils Aint Oils Or Are They?

[lrnut]

So im relatively new to Jeeps after many years of playing with Land Rovers V8's and diesels.

I have a 99 XJ Sport and its time to do all the oils.
I wont do the auto i'll have that serviced.

What are the correct oils and weights that everyone uses, even brands if your loyal to a particular brand

I'll be doing

Engine
Transfer
Front Diff
Rear Diff
Brake
Power Steering


Sorry if this has been covered before and thanks in advance

[junglejuice]

Oils ain't oils...

Nah Sol and goils ain't goils.... sorry couldn't help it...

I use Castrol dx3 for the t/case and transmission.
Castrol LSX90 for both diffs unless I'm doing a long trip towing then I run Castrol LSX85w140.
Engine oil usually a 20w50 with a Z9 Falcon oil filter so it takes almost 6 litres of oil.
Brake fluid, either Valvoline or Castrol, mainly Castrol.

[lrnut]

Thanks JJ so theres no problem running an LSD oil in the front diff?

Would 85/140 be to heavy to run in both front and rear?

[junglejuice]

It's only the limited slip additive so I don't believe that there is any issue, I don't think it's necessary to run that heavy an oil unless you're working it hard, ie big tyres or heavy conditions but others may/will have different thoughts on that, it will most likely make it heavier on fuel too so for me LSX90 is sufficient for normal driving...

[freekinexjay]

Engine Is a 5w-30 I use Castrol edge in mine and she runs smooth (230,000km)

Recommend ATF (auto trans fluid) Dex 3 for the transfer case and tranny

Diffs both front and rear go for a limited slip diff oil 80w-140

Power steering I am not sure haven't yet needed to do it

[Roler]

Engine: 10W30 Valvoline with a good WIX filter

Transmission: you dont have to have it serviced, you can do the drain/refill yourself a few times until the ATF stays red. Than you're done for several thousand km's. Use Dex III compatible fluid in your AW4. Not ATF+4, even if they say Chrysler recommends it now. Just stick to the Dex III. If you have it serviced by a shop, make sure they dont put anything else in there.

Diffs: 80W-90 in there with LSD additive in the rear diff. But I'd put the 85W-140 or whatever has the additive in it, in there. If you have a LSD.

Power steering: Mopar power steering fluid.

You might want to change your coolant as well

[lrnut]

Thanks for the input so far guys.

Thinking i'll be going Nulon Oils, if anyone has good reason not to now is the time to speak up!

Engine: Nulon 15W40 Semi Synthetic Everyday Oil
Diffs : Nulon 85W/140 LSD or SAE 90 LSD Oil
Transfer : Nulon Multi Transmission Oil Dex III compatible
Transmission : Same as above if i choose to do it myself
Brakes : Nulon Xtreme Performance DOT4
Power Steering : Nulon Full Synthetic Multi Vehicle Fluid
Coolant Nulon : Premium Long Life (Green)

Anyone think i shouldnt be using any of the above?