if u mean not changing the engine oil after 5000km then build-up of sludge, lubrication characteristics of the oil will decline, resulting in engine friction, wear or even damage in the long run.
depends on how big is the crack.
small crack = cant feel
large crack = no "pickup"
unless he got a very very valid reason to do so, it is very wrong. advise u to stop going to such shitty shop in future.
both rear tyres should be shifted to the front in a "cross" manner (left-rear to right-front, right-rear to left-front)
depend on ur tyre condition, if ur threads are very uneven, now u will have better grip in the wet on one side of the car - very dangerous!
i also wonder if ur mech bothered to check the rotation direction of ur tyres before he swapped

Me can't get up that time.....
Too much of PS3 adi XD

Bluhapp: Nice mods, your setup is going for bang for buck mods, top speed shouldn't be a problem at 200km/h. But the 4-2-1 PZ extractor, RM200 that cheap meh? Oh yeah, go do engine balancing for your 1.5 block as well, kao tim 1 shot. No worries later

got up at 7 today -.-...go to college...missed the breakkie with sifu cheeann

bangsar i know lar ss2 i duno... or u go old klang road search mr chee ann.... he is here mia sifu... btw chee ann i cant find a time to find u bcoz i busy wit work... apparently everywhere internet is down....

ss2, find cheeann also can... just further but his service quality good...

no la,me cari makan saja~
still learning new things especially  doin knocking job on cars~ 

might cari u for 4x4 brake service... haha
tat want use dot wat? 4, 5, 5.1?

@ CheeAnn , will try to look for ur shop when going for next service for my wira

seem like ur giving good service to lowyatian....

and hope ur price is not expensive

You will be surprise when cheeann asks for payment

oh,my labour very expensive 1 wor~   
my workmanship expensive rite? ?   

heyz,u still owes me rm30 or rm40? ?   

I am not sure man~~
I remember not until that high gua~~

I remember I gave you RM50 adi that time
Adjust camber and alignment right that time?

can't remember~
jus remember how much u hutang me only~ 

cheeann, ur part time job is ah long ar?
lol

I didn't even know I hutang you RM30, as in actual amount