rufusrevs

Hello - In considering replacing the LE-607 in my differential, I see it's been replaced....

All indications here on S2Ki are that the replacement is LE-1605, but the LE website says LE-1605 is an SAE 110 grade oil, and that LE-1604 is SAE 90.

Is LE-1605 the Lubrication Engineer's 'official' replacement for LE-607?

Are people really using an SAE 110 oil in their S2000 differentials? .....what am I missing?

Thanks,
Bob

Edit: Here's a link to the LE specification page.....

http://www.le-inc.com/products/docum...1609_flyer.pdf

AP1Chris

I ordered the LE-607 on hardtopguy.com and I was sent the LE-1605. I checked around on the net and all indications were that it was ok to use the LE-1605. I'd like to have a little more info on the diffrences though.

Here is some info I was able to dig up, it has an email from LE in the thread.

LE-1605

I did a diff fluid change today and used the LE-1605 that HTG.com sent me. I can't really feel or hear any diffrences.

-chris

dedonderosa

yea is this true???? someone explain

innovation

LE1605 is a direct replacement to LE607 per LE's representative

shotiable

the FAQ says that le607 has been replaced by le1605.

can anyone confirm if we need to flush the differential with something like 10 weight oil before putting in the new diff fluid?

rufusrevs

Do anyone have this in writing? What does the LE-1605 packaging say??

I see in this thread found in the FAQ,

https://www.s2ki.com/forums/index.ph...c=115704&st=25

that RoadRage referenced LE-1604 as the equivalent of LE-607. Then someone asked his thoughts on the reports of an SAE oil spec change that makes SAE 110 equivalent to the old SAE 90, but he never reappeared to answer......or if he did, I didn't see it.

Some good questions would be:

Why does LE designate LE-1605 as an SAE 110 oil on their internet site if it's really equivalent to the old SAE90???? Doing so would simply create a lot of customer confusion and skepticism leading to people switching brands.

Or why haven't the other brands relabeled their gear lubes as SAE 110 too?

And finally, Does Honda now specify SAE 110 for the rear end of the '09 S2000?

Something just doesn't sound right to me......

Cheers,

Bob

Alphamale

Someone posted their email conversation about this with LE awhile back. Can't find it but I do remember the LE rep stating 1605 was the replacement and that it was a better product than 607.

I've been running 1605 for about 1200 miles now with no problems.

INDYMAC

It says right on the Le1605 box (case of 24 qts) that it is the LE607 replacement.

LE also states that LE1605 is fully compatible with 607. No flush is required.

LE607 was formulated before SAE J306 specs circa 2004 were installed for gear oil labeling (SAE90 is now split between SAE90 and SAE110). Before J306, the SAE90 gear oils always fell into the higher viscosity range of SAE90, while the multi-viscosity 90's would fall into the very low end of SAE90 if at all. Honda (and Toyota) recognized this discrepancy and recommended that their customers use the straight SAE90 in order to insure the proper protection at high temps. They still recommend SAE90, because of it's inherent viscosity stability. They don't have to use as much viscosity improvers that tend to break down in use.

Here is a link that explains the J306 changes (you can view both):
http://www.lubrizol.com/products/automotiv...ar-oil/J306.asp

Hereis a test study by AMSOIL that actually explains why there are some problems with multi-vis gear oils staying in grade:
http://www.amsoil.com/products/gearl...hitePaper.aspx

LE1604 would be an excellent choice too, but it is not available in quart bottles. A 5 gallon pail is the starting point. LE1605 is your best choice though.

chino101

There are two viscosity standards, SAE and ISO.

I looked at this closely before I put it in my diff, and found that the ISO viscosity specification between Le-607 and LE 1605 is essentially the same; ISO 220.

INDYMAC

You are correct.