2005 Toyota Avanza( Kijang) 1.3L rear axle ODO 162,000 miles 269,000 km :
Out:Shell GL5 SAE 90 - with goldenish green hue colour,
In :Petronas GL5 SAE 90.
OCI - 30,000 miles. (Manual , 24,000 miles with SAE 80W90)
2008 Subaru Legacy GT Turbo 5MT trans/transaxle combo-
OUT: Valvoline 80W90 Conventional
IN: REDLINE 80W90NS with 1 qt of Heavy ShockProof
Shifts like Butter and minor gear "whine" is about gone within 200 miles.
2016 F150 XLT 4x4 2.7L Ecoboost @ 26K
Front diff: Out milky-looking factory fill; In ST 75W-90 ~1.5 qt
Rear diff: Out factory fill; In Motorcraft 75W-85 ~2.5 qt
Transfer case: Out factory fill; In Motorcraft XL-12 TC fluid ~1.5 qt
1988 E-150 gear oil in service 25 years, and 62,690 miles. All my notes said was "synthetic 90w".
The stuff was red like ATF, nice and clean, and probably could have gone another 25 years. lol
This time I gave Valvoline 75W140 and some Ford LS additive a try.
Sorry about the angle of the pic, it's OK on my PC.
98 Ford Explorer, 4.0L SOHC Cologne V6, factory 3.73 LSD, 125K
Out - OEM or unknown fill from the truck's past life in SoCal(it was in my adopted "family", it saw service by Mr. Lube in Orange County and probably was filled with Valvoline or Pennzoil). It was a quart low and muddy.
In - 3 quarts of "synthetic" 75W-140LS: 2 of them was Valvoline, 1 was ST. It was still low, so I topped off with 12oz of 80W-90 ST dino stuff.
2014 Jeep Grand Cherokee Limited 4x4 - 58K KMs/36K miles
Front and rear aluminum differentials
Out - Factory fill
In - Castrol Syntec 75W-90 Gear Oil
The fluid in the front diff still had a golden color to it, while the rear diff was dark/grey-ish.