Interested in opinions on best bang for buck on 80w90 or similar weight synthetic

[Reworked LMTV]

I have 3 axles to drain and fill. Interested in opinions on best bang for buck on 80w90 or similar weight synthetic. What brand do you like to use? Where do you find the best prices.

 

[spankybear]

I think you may have more options if you look at 75W90 synthetic . I am reading to see if I will go this way nor not.

The dude who I talked to doing gear swaps suggested Schaeffer 293 Supreme Gear Lube 80W90. I can't find this locally. 80w90 is good down to -15° F But reading below I think I may look something in the 75W90. It will allow you to operate down to -40° C/F and has no limit on the upper end of the temperature.

 

[Reworked LMTV]

I think you may have more options if you look at 75W90 synthetic . I am reading to see if I will go this way nor not.

The dude who I talked to doing gear swaps suggested Schaeffer 293 Supreme Gear Lube 80W90. I can't find this locally. 80w90 is good down to -15° F But reading below I think I may look something in the 75W90. It will allow you to operate down to -40° C/F and has no limit on the upper end of the temperature.

I think you are right. If traveling to colder climates, a wider viscosity range would help. The cheapest good synthetic unfortunately is Chinese based Sinopec. I have heard good things about the oil, but have philosophical issues with purchasing it. Sinopec is now on the Mercedes list of recommended oils.

I noted that one my axles had some evidence oxidation / slight rust in sparse areas. I found that the rear seal black rubber(closest to the back of the brake hub) had broken apart from the metal seal flange. I believe this allowed H20 to get in. If you have not already done so, replace all those seals.

 

[spankybear]

I would say you could pick any off the Meritor Technical Bulletin below. And again I believe it will be eaiser to find a 75W90 and the TB also shows that. ymmv

ETA... I will try my darnest to stay away from Chinese stuff... You are just not going to save than much on Chinese made oil to make me want to buy... Now that trans jack... I went to the dark side. $2000.00 v $250.00... The jack should be used very little.. Oil... not so much