i have a 2003 is300 and i was thinking about putting royal purple synthetic tranny fluied and oil in it i notticed a big differnc in my sc400 but im not sure about the is300 help me please im so confused

 

Engine Oil = Royal Purple is good company. I used them also, sometimes mobil1 depending on which one I feel like using.

Tranny wise, it would depend on if your auto or manual.

Auto = I would recommend using OEM.
Manual = Synthetic blend is good to use. I used the same Royal Purple 75/90 on the diff.

 

I like Royal purple for my transfer and differential, but if I had some Amsoil ATF around, that would go in my tranny

 

Yeah, I heard some people using Amsoil Syn ATF fluid and being fine, but not everyone agrees on it...

To be 100% safe, I would use OEM. If boosted ppl are running OEM fluid with no problem, than it should be good enough for N/A or stock ppl.

 

thank you guys so much

 

N/P~ Good oil makes the car feel good

 

I use AMSoil fluids for everythign atf/oil/gear lube...