hi...need some advice on my 2007 Kelisa Auto :
i feel that d car's engine is a bit "berat" whenever in need to accelarate..it doesnt have d pick up like it used too.. and lately when reaching speed 140 (not all d time..just when feeling kiasu) i smell somehting burning..but i'm pretty sure its not the smell of brakes..only when speeding at that speed..i thought it was because of my 4 months engine oil..but even after I had changed the engine oil, it still feels heavy..i had used castrol 10w-40..
any idea y is this happening?