thankz Rusty_IL_Kia .

sorry for the dumbs questions , but since im kinda noob on those mechanicals stuff, what will i gain in changing my oil and air filters to those u mencioned ?does the oil filter needs to b replaced when i go for the 10000km oil change also ?
what is a 2,5 exhaust ? what will i gain in replacing mine ( ive think ive already got installed , if not , them its adding one ) .

btw , whats is the best oil to use on sportage ? my mechanic advised me to use castrol gtx3,is it good ?
another one is , can i put a 235*75*15 on my sporty without no rubbing , or i have to lift it ?

and the last one .. could u gimme some link to a exhaust 2.5 ?


thankz again .