Can anyone please explain here that what the grades of Gear oil means? and what grade of gear oil is best for Baleno 1.3
My earlier mechanic used to recommend SAE-90 but my new mechanic has used 140 grade gear oil, i inquired him about the difference between 90 and 140, he said its thicker than SAE-90 and it will create less pressure in the gear box. i told him that i have used 90 grade earlier. what grade of gear oil is required ? Is it safe to use 140 grade in baleno ?