Road Rage

Amsoil has some 90w ISO220 synoils. Here is what I copied out of their website:

"The SG Series Gear Oils meet the AGMA ratings for synthetic gear oils and EP gear oils and are recommended for use in applications specifying these standards. Although AMSOIL SG Series Oils are compatible with mineral oil based lubricants, for optimum performance it is recommended that the system be thoroughly drained and, if warranted, cleaned."

OK?

jyeung528

would you recommend the amsoil 90w over the le607 90w? since amsoils 90w is synthetic...seems like it'd be better?

what is the verdict.

Road Rage

[QUOTE]Originally posted by jyeung528
would you recommend the amsoil 90w over the le607 90w?

nsx555

It would be hard for them to recommend it after one of their reps said it took 20 something minutes to start lubricating.

Road Rage

I believe you are confusing their post - they were citing the flow characteristics of a typical MINERAL-oil based 90w - the tipoff should have been what I posted about the low pour points of the synthetic industrial gear lubes. The Amsoil guys were trying to disparage the LE product on two counts:
1) that it was an industrial lubricant not suited for automotive use
2) That 90w non-synoils take forever to flow (I already addressed this so let me comment on #1).

Generally, I would agree that industrial 90w gear oils are not recommended for our hypoid gears (hypoid means the teeth slide over each other). LE-607 is considered a multi-purpose lube, and has proven itself in over the road vehicles, not just worm gear rock crushers (where it has also excelled). It meets both GL-5 and industrial gear spec 5P, ISO 220. Should I ever determine that it is not performing as promised, I will certainly raise the flag.

BTW, hypoid gears experience wear on both sides. There is the "drive" side, where gear contact occurs as the car is powered and the gear set pushed one way, and the "coast" side, where the loading on the gear set is reversed. That is why proper ring/pinion alignment and load adjustment is critical - a bad installer can ruin the party.

Some of the heavy duty Ford 8.8" case covers actually have large, Allen-head set screws on two sides that allow the tech to tension things precisely, once the entire axle and diff carrier are installed in the vehicle. That is one way those mega-HP 7 sec Mustangs stay in one piece, blast after blast. I am waiting for one of you crazies to install a GM 12-bolt or a Ford 9" in an S2000.

jyeung528

[QUOTE]Originally posted by Road Rage

Road Rage

OK, I hope this is the LAST post.

"They" were the Amsoilites who were bad-mouthing LE-607 as an "industrial lubricant" and not fit for automotive hypoid gears.

Here are the facts:
AMSOIL'S industrial ISO 220 gear oils are not fit for automotive use, as they do not have enough EP additives to qualify as GL-5. I have direct quote email from their Tech Svcs on that. You can book it from me.

LE-607 is certified GL-5. It just happens to have much higher film strength/load capacity than Amsoil's synthetic 75w90 or 80w90 gear oils. Book that also.

Good News for Cold Weather guys:
Lubrication Engineers has a PAO-based syn gear lube called 9921. By the spec sheet, it shows the following:
40degC 136 cSt
100 degC 17.2 cSt

These are higher vis than either Mobil1 or Amsoil.

That is traditionally close to an 80w90, but is spec'd at 75w90 because of the low pour pint.

It costs $125 or so in 35-pound pails (5 gals). I have ordered up a pail.

tron1

Returned from Monterey today... 240 miles, nice 'n hot diff, and changed over to LE 607. Sat the bottle of 607 in the sun for a 30 min. and the black metal oil pump as well. No problems with injecting the 607 into the diff. From start to finish, including cleanup, about 30 min. The diff drain plug looked a bit dirty (less than 10 mos. of use since last change from M1) and it seems no matter what quality oil is used a yearly drain of tranny/diff is very good insurance to keeping the gears etc. in top condition.
Thanks RR for your recommendations and analysis.

Road Rage

[QUOTE]Originally posted by tron1
Returned from Monterey today... 240 miles, nice 'n hot diff, and changed over to LE 607.

tron1

RR:
Pictures of my muffler setup and "black metal oil pump" can be found on this link. I posted this a few mos. back.... you might remember visiting this site ....

http://forums.s2ki.com/forums/showthread.p...threadid=179928

The trip down to Monterey was ok. Weather conditions on the way down was very cloudy, with lots of rain, drizzle etc. etc. Found some interesting roads to explore. I will post some pics on the Sacramento Club web site one of these days.

Nice that you came west and explored those roads... I love traveling them and have several more trips planned down that way. In August is the Councours at Pebble Beach... enuff said. Eat your heart out!