SpitfireS

https://www.ato24.de/de/auto/differe...triebeoel.html
They also ship to the Netherlands, order over 40 Euro and shipping is free.
I would recommend Amsoil MTF for the transmission, you'll need 2 quarts.
Get some other fluids (brake fluid, engine oil) to go over 40 Euro?

I can't find the Dutch online shop I used to get Amsoil from (it's been a while)

About the handeling:
What tires & wheels, what tire pressure?
Alignment?
Are the front/rear wheels not mixed?
Is the car lowered?
Shocks ok?
Sway bar links?
If your S2000 drove around in NL during winter the alignment bushings & bolts are most likely seized.
(unless they did what I did and replaced them all and used a liter of NeverSeize to make sure they don't rust into a single piece again)
They can give some unwanted pre-load on the suspension when turned to get the alignment looking ok.

The S2000 is very sensitive when it comes to tires / alignment.
The locking bias is a factor and noticable when all the other variables are 100% (IOW they are not 'it')

Mr.Matchbox

Flanders, thanks for the table. Some SAE xx-140 oils are very close to the 100°C 24 Viscosity where SAE 110 ends.

RolanTHUNDER

You forgot Liqui Moly

So the higher the viscosity at 100c the "better" the protection and the higher the fuel consumption (not that fuel economy is a major concern for us)?

flanders

The table is a couple of years old and I don't think Liqui Moly had anything that looked interesting but I will ad them later
All else equal higher viscosity should mean better protection and of course higher fuel consumption (this is probably very minor).

Chuck S

(Everyone's owners manual.)

Why is this getting so complicated?

If it isn't labeled this way it's not suitable. If it is, it's OK. Note the change in SAE spec a few years that now has 110 the match for the old 90. Brand name is unimportant but pure multigrade synthetics are indisputably superior to single grade dino lubricants in automobile applications.

LE1605 is $25/quart. Direct. No need to try to find am Amway Amsoil dealer selling stuff out of the back of a pickup truck.

-- Chuck

SpitfireS

This is too black & white and I think you know it.
Not really. SAE added 110 in the range as they figured the spread of the 90 was too large.
We can only guess what Honda had in mind as viscosity for their SAE 90 GL5/6 oil.
Given the GL6 I guess they liked it at the higher side and that could be closer to a 2018 SAE (75W-)140.
Your guess is as good as mine, btw.
SAE 90 still exists, why don't you use LE 1604 then, an ISO 150 (= SAE 90) oil?
You do realize LE 1605 is a single grade mineral gear oil, right?
LE doesn't even use the word synthetic in their Duolec (R) product description, if you can find it, show it.

One has to 'translate' the 1999 manual into 2018.

Lets open another can of worms: what do you use for engine oil?
Dino 10W-30?

There was a test posted by people on an Australian 4x4 site a longlong time ago about LE oils and they found it reduced diff temps and reduced fuel consuption.
Towing boat trailers and such.
Thicker oil in a diff will take more energy to turn but once the friction is reduced to the total energy used is less.

Chuck S

Just off the phone with Lubrication Engineers minutes ago. Guess what? LE-1605 no longer marketed or labeled as GL5! There's a new formulation and new bottles. Sales had Engineering call me.

After a few minutes of pleasant conversation it was determined they do have a couple of GL5 hypoid gear oils. LE-703 80W-90 grade is available in quarts for $26.54, about the same price as 1605. LE-704 85W-140 is only available in a pail as the smallest unit.

I did confirm that the new LE-1605 is the "functionally the same stuff" as the old albeit in different bottles according to the engineer but they now neither list it as a GL5 nor market it for automotive use. I have a couple of bottles of the New LE-1605 as well as some Amsoil. Decision time in a couple of months.

-- Chuck

windhund116

Chuck, good work. A question or two. Why is LE taking LE-1605 off the automotive market? Are they planning to discontinue it or was this due to a lawsuit?

Thanks!

RolanTHUNDER

Cool I have Liqui Moly GL5 85w90 LS mineral oil which I have not used yet which is what made me ask. After reading this thread I am thinking of ditching it in favour of a higher hot viscosity...

RolanTHUNDER

This is so true. Personally felt the bad effects of bad tires and the good effects of good tires. The car definitely lets you know what it thinks about these including the quality of your suspension mods.