Quote Originally Posted by drin21 View Post
additional questions sir..

is it true na grade III lang ang Castrol oils? RP and Castrol kasi pinagpipilian ko for my next oil change. my car's warranty is over so pwede na ako outside the casa.

is it ok to use 5W-30 instead of 10W-30 on my 2007 Aveo? will it increase the engine performance (even for a small margin only) because it is thinner? it has been using 10W-30 eversince kasi. i am worried about 5W because the manual says use 10W on hot climate.

do i need to flush the engine since i have been using oil from the casa? or ok lang na hindi na magflush pag nagswitch sa RP?

can i use Max Gear for the manual tranny fluid?

thanks in advance sir.
hi sir, imho lang, if you feel uneasy sa pag palit sa 5w-30 then you can still use the same 10w-30 with royal purple...

since you're vehicle is quite new, im sure din na you're seals are still intact and can still handle thinner oils.

after my 1st casa 5k change oil I moved from shell full syth then on my 15k change oil i changed to royal purple 5w-30. and it really gave me positive results on my observation.

im now near my 25k change oil and will also change my transmission oil to royal purple. ( sir Migs!!! handa mo na pwesto ko dyan.. ahihihihi!!! tune up din ako ha? pa check ko yung valve and tappets ko...)

regarding your transmission oil/fluid.. you can check the royal purple site, they have the list of vehicles specific to their transmission fluids recommended.

hope this can assist you sir.