Hmmmm... I'm not really sure about this coz i change my engine oil every 10,000km or 4~5 months whichever comes 1st... My bro n me been doing this for quite sometime now... My bro car has already reach 120,000km in the span of 3 years n still haven't need to do any overhauling ler from the sludge thingy or whutever... My 1st car reach 100,000km milage too b4 i sold it n it never needed to overhaul b4... My current car is now at 40,000km n still ticking..

I think maybe it depends on the oil quality n how frequent u change type of lubricants during ur car lifetime... be mindful also that everytime u change ur engine oils not all of the dirt and grimes would come out with the dirty engine oils.. Some may still be in ur engine so it is not suprising to find sludge etc in ur engine..

My job involve with dealings in the petroleum sector n i had talked with a few engineers from oil company's like caltex n petronas n they all advise against the habit of frequent changing of oil brand/grade/type n such.. They say if u really wanted to change u should atleast use the same brand/type/grade for a while (maybe after 3 service periods) only after then u can try other brands/type/grade. No engine oils are made alike in terms of formula n such.. n u can't really see/feel any diff with just one time trial service using a specific brand/type/grade... Sometimes it takes a longer period to see the difference.. Maybe after 2-3 service period..

i know that your car you driving is still can drive but do you look inside the engine, even with sludge your car is still drivable mah.

btw those car i say are regular service at 10000km interval and either using fully synthetic oil from petronas or caltex.

the major issue here is that test done by major oil manufacturer on fully sythetic and the test show that this oil can last more than 10000km of use but you must know that they are doing the test in a control enviroment/lab that is stable temperature and humidity whereas we are driving in variable condition.

just followed the sticker

same here... when the time comes just leave it to the mechanic..

full-syn every 5000 as prescribed by the manufacturer.

Here's a thread from another forum which supports what micwin1437 said. Old thread but still very much applicable. Or maybe the threadstarter and micwin143 are the same person...?
http://www.autoworld.com.my/forum/allposts...%27nuff+said%3F

hehe...u sure ar u hantam every weekend? how about weeknights?

Once activated/opened, a pack of fresh milk will go bad faster than expiry date whether u drink a sip or half the packet

Engine oil once activated it turns acidic over time, thats why u need to change every 3 months cos it starts to breakdown on exposure to heat etc

who wan 2 service their car's engine oil,oil filter or gear oil at ur own time without making appointment n wait long Q? jus give me a pm,ok?

i just recently serviced my car in shell autoserv, due to unexpected breakdown from power steering pump.

i was using petronas fully syn, few services before it and decided to try this shell helix ultra on 30,000km

remarkably, i found out that, its much easier to accelerate and i could hit 180 km/h way faster than on petronas, guess engine oil does make a difference. i have better fc on the same journey, even though i hentam at 180, haha

good thing about shell autoserv is that, there's wifi while u wait and u can order food from nearby mamak stall and get it delivered to ur place, first class! plus the cleaniness of the place is appealing. the one i went to was the one located next to carrefour kepong, i hope that helps

This post has been edited by KeV: Jun 25 2007, 08:53 AM

where is that place?

been using petronas 800 and having my service done at every 10k......
and not having any issue with that.....

theres lots of shell autoserv around klang valley. only the one, i went in kepong is my friend, next to carrefour but he's gonna quit and move on to a perodua service centre, hehe

rm218 includes lots of things

shell helix ultra oil change
tyre balancing
36 point car checkup
nitrogen tyres fill up
free car wash
free gift, tool kit box
free oil filter change

basically a good deal under this package

oil degrades. that's why its a 5000km/3 months period. after 3 months the lube properties will slowly degrade, and might not be able to properly lube and cool the engine.

mayb i driving an old car, doesn't change at shell autoserv. their service is good.

last time around there is a salesman selling a package of RM 25 with 8car wash, 36-point health check, nitro gas in my tyre.(if i'm not mistaken). everytime i drive my car to wash, they serve me very well. ask me about coffee also. haha ^^

but the packages seems a bit expensive for me, while i only use the Castrol around RM 60 for changing my engine oil, oil filter only cost me about RM 10. i change it after 5,000 km. but i will check the oil condition also. coz my dad said no need to wait 5,000km, sometimes engine oil wil become bad in use before the mileage.......depends actually.

mine every 3 months now or 5000km if I manage to cover it due to my tripmeter rosak

Go fix teh trip meter!!!