Different kinda tyre shop

Time to service my car..
I went to a near by tyre shop, Chian Soon for tyre rotation and normal car maintenance
the sales guy who attended me twice previously welcomed me..

me:" i want to have my tyre rotate, and engine oil change"
x: "Ok.. so that will be including balancing and alighnment. Car filter 25 and oil ..."
me: " wa.. why the filter so expensive?"
x: "original one"
me:"can i have proton one?"
x: "cannot la."
hahaha.. he actually said 不能拉。
me: "Y cannot? it is compatible waht"
x:" yay but the thread not exactly the same so not good"
me:"but I have been using proton one for sometimes d le"
x: "ya but not good since the thread not same."
me:" but compatible ma.. and proton cheaper"
x: "ya proton cheaper 10+, but not good"
i think i not able to talk win him..
so i actually said
me :"OK la.. whatever" 随便啦。。

I am really a "very good" consumer..
It sound rude for him to say cannot to me.. but..i think acceptable.. :-p
however i just ponder over why would they keep stock of original oil filter?
they are not authorised dealer, do they? They just tyre shop.
and they sound familiar with atoz over 2 incidents i encountered with them.

x:"OK.oil is 60. what kinda oil you wanna use? normal one or good one?"
i was thinking and he about to explain normal and good one.
"This car better use 10-30." the boss appeared from no where..
x: "then 60 one ba"
wow.. real impressed.
because thats the oil grade, a mechanic recommended me to use.
my car no need use good oil.

then after 2.5 hours
a man called..
y:" hi ms something broken in ur car, the car chamber causing ur tyres wearing off"
me:"oo... whats is chamber?is it something that needed to fix?"
y:"is that convenience for you to drop by?"
wow... what is so serious that i need to go to look see?
it was so hot out there walked 100M under the hot sun.

the young mechanic showed me the sign of wear..
i nodded but i don understand..
then he showed me some numbers in a monitor..
wow.. it was so techies i caught no ball.
showing me a picture that the front tyres actualy swing to right..
instead of I----I it became I----I
so it was the chamber that out of position..

he tried to explain to me over and over again..
he was so patient to make me understand the tyre wear and tear..
and the chamber thing..
i see him so patient to 'teach' me so i pay extra attention to understand :-p
finally come to pricing.
to fix the front chamber cost me 80RM.
OK since you so good. just do ba.
he actually told me that back chamber is a bit out pos.
but it is normal and you cant do anything on back chamber anyway.

Somehow i felt they are sincere in doing business..
they have their principle in doing business (the filter & previously was tyre)..
the boss knows well on car.. (seems)
the mechanic also sincere in doing their job..(explaining 'tireless' to me)..
i felt happy with the service, may be a bit more expensive.. (may be only i don know)
well... happy happy la...