oh kewl thnx...feel better now

 

I find it remarkable that anyone would reasonably instruct you to do "8s" for 2 HOURS! When I did a fluid change on a Dana 44 LSD (with clutch packs) and then added the required bottle of friction modifier, the instructions were to do TWO complete full steering lock figure 8s. The only purpose of this was to mix and circulate the friction modifier in all the nooks and crannies of the clutch packs.

 

xviper,

Since you are aware that the factory uses 80w90 gear oil, why do you continue to use Mobil 1 75w90. Wouldn't you want to put the factory 80w90?

I ask this because I wanted to get the Amsoil Series 2000 75w90, but since Amsoil doesn't have a Series 2000 80w90, I have to go with Amsoil REGULAR 80w90.

Jeff

 

[QUOTE]Originally posted by jyeung528
xviper,

Since you are aware that the factory uses 80w90 gear oil, why do you continue to use Mobil 1 75w90.

 

[QUOTE]Originally posted by jyeung528
Since you are aware that the factory uses 80w90 gear oil, why do you continue to use Mobil 1 75w90.

 

You are correct. This is Honda Canada's closest thing to an "in house" product that they could safely use on a nationwide basis. Going to their motorcycle division isn't exactly cheating, so they went with it. It's obvious that American Honda has not taken the same view and you guys are left to fend for yourselves.

 

A 90w, 80w90, and a 75w90 are all different. At normal room temperature, each will be successively thinner than the previous. 90w will not flow well for several minutes at temps in the teens or near zero, so I would defintely go easy with the factory fill in the first 10 minutes of operation.

All should be relatively close to the same SUS (Sayboldt Universal Seconds), a measurement of oil flow (in seconds) over a specified distance at a specified angle - primitive but effective metric, at 212degF. The 75w90 will flow better at startup and in very cold climates, espcially if it is synoil.

The 80w90 and 90w will be more resistant to high speed shear - the 90w has no VI improvers to shear down.

Also, it is not well known that the vis of the oil also is used to effectively QUIET gear noise. Expect more noise from one of the multi-grade oils - the 75w90 being the noisiest.

Straight 90 is practically unavailable these days. What I plan to do is mix 75w140 and 80w90 synoils to get 77.5w115. The 115 will provide high temp protection, being only marginally thicker than the 90w, as well as damp gear noise effectively, while still providing much better cold flow than the 90w. Of course, i will be using synoil - likely Amsoil.

 

Thanks Bret,

So the owners manual specifies straight 90 weight oil, not 80w90. Does that mean I should be looking for a 90w90 gear oil?

 

sorry, didn't read the second page...

...thanks road rage, you cleared it up. Do you have any objections if I decide to go with the Amsoil Series 2000 75w90?

 

[QUOTE]Originally posted by jyeung528
sorry, didn't read the second page...

...thanks road rage, you cleared it up.