synthetic or ordinary engine oil???

[userfriendly]

Ic,

my point would be (that's why it is OT) is the Tranny , Power Steering, Brake Fluids, etc....

would it be Ok to use the aftermarket ones (lets say, MOTUL)

Like Archie said, ok lang as long as you use the correct rating. Although, some premium brands like Motul and RP are better than more common brands. It really depends on your budget and preference.

For ATF use Dexron III if its what the manual specifies. If manual says use Dexron II, you can use Dexron III. They say that synthetic ATF is better than ordinary ATF. Cant say for sure as I've never used synthetic ATF.

Power steering usually uses ATF.

Brake fluid, most common is dot 3. Some cars use DOT 4. Not sure but I think you can use DOT 4 in cars that require DOT 3. There is DOT 5 which is NOT compatible to DOT 3 and 4.