Modern fluids vs Old car Options

[Andre_L]

Hey, I'm a new owner of an ST204, and I was wondering when adding and/or changing the fluids should I keep to the fluids recommended in the owner's manual, or if there are better modern solutions considering the age of the car? I'm talking everything: oil, trans, brake, coolant, etc. The reason I bring this up is because I want to change the oil, and I read somewhere that it's not recommended to use full synthetic, however if the car has already been given synthetic then it's ok. Unfortunately I forgot to ask the previous owner a lot of important questions, so I don't know if it has been given synthetic.

Any input and responses are greatly appreciated.

[Bitter]

Better is usually better, as long as the new fluids meet or exceed the specs denoted. Dot4 is an upgrade from Dot3, gear oils can be tricky though, some don't work well in some transmissions or with worn transmission, and some make a worn transmission feel new again. Powersteering fluid can be swapped out for synthetic auto trans fluid to improve cold weather performance.