what is your vehicle? 2wd or 4wd? check the owners manual and get the required gear oil specs for your car. if it's a 4wd vehicle you will need to put hyphoid gear oil in the drivetrain.
most gear oils sold in in petrol shops are not hyphoid gear oil...usually sae 90 rating. castrol hypoy, mobil 1, and redline gear oils are examples of branded hyphoid gear oils.
hope this helps.
Most vehicles (except some heavy trucks) will have hypoid drive axle gears whether 4x2 or 4x4.
SAE 90 is the viscosity rating and is not related to hypoid gear compatibility.
Hypoid" is not really a question of oil, so much as a question of gearcutting. Old (1920's) rear axles used straight bevel gears to form the crownwheel and pinion.
These had two disadvantage, the pinion shaft meets the crownwheel on its central axis, and the straight cut
gears are noisy. By using a more complex "hypoid" gear tooth shape (if you look at a pinion, the teeth appear twisted) these problems can be addressed. The more gradual engagement of the teeth along their length
reduces noise. By careful design of the geometry the pinion can be made to mesh below the axis of the crownwheel. As the centre height of the crownwheel is fixed by the wheel height, this allows the propshaft to be lowered relative to the car body, giving a clearer
floorpan and lower centre of gravity for better cornering.
Hypoid bevels are now universal in this application.
Because of the sliding contact that hypoid gears make, their hydrodynamic contact pressure is higher. To be suitable for use with hypoid gears, a lubricant must be capable of resisting high pressures.
Oils with "EP" ratings (Extreme Pressure) such as EP90 are required.
Some brands describe themselves as "hypoid" instead, a term which is synonymous with EP. GL-5 is a formal API standard for this type of oil.
A lot of gas Philippine gas station gear oils are GL-4 but most modern vehicles will require GL-5.