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Isaac Zachary · 10-06-2021, 02:36 AM

If engine oil is recommended I'd recommend engine oil.

If I'm not mistaken, 70W85 gear oil is about the same viscosity as 10W30. I don't see why some GL4 wouldn't work though.

10-06-2021, 02:36 AM	#13 (permalink)
Isaac Zachary High Altitude Hybrid Join Date: Dec 2020 Location: Gunnison, CO Posts: 1,985 Avalon - '13 Toyota Avalon HV 90 day: 40.45 mpg (US) Prius - '06 Toyota Prius Thanks: 1,055 Thanked 545 Times in 436 Posts	If engine oil is recommended I'd recommend engine oil. If I'm not mistaken, 70W85 gear oil is about the same viscosity as 10W30. I don't see why some GL4 wouldn't work though. __________________