Motor Oil Change hot or cold?

[Lukezen27]

Hey Guys

Anyone got any insight on this?

I've always changed my own oil and I do my own service's but never cared if my car was hot or cold but now that I'm boosted I need to change my oil more often maybe this might made a difference in the long term...

Thanks Guys

Luke

[Riviera]

cold unless you wana get burned or sweaty, usually in the morning for when its all down in the sump otherwise you end up waiting for an hour or so for the oil to drain out

[online]

Do it when it's hot, usually after a good drive.

Jim

[[JDM DC2]]

Do it when it's hot, usually after a good drive.

Jim

x2

When the oil is hot it is thinner and drains better

[aaronng]

;1597067']x2

When the oil is hot it is thinner and drains better

It drains better when warm, but more of the old oil will be in the head and galleries. Doing it after a drive means you leave a larger portion of the old oil in your engine :thumbdwn:. So best is to let the car sit for a while to let all the oil flow back down into the sump first. Then drain.

[Lukezen27]

It drains better when warm, but more of the old oil will be in the head and galleries. Doing it after a drive means you leave a larger portion of the old oil in your engine :thumbdwn:. So best is to let the car sit for a while to let all the oil flow back down into the sump first. Then drain.

Cool

Warm it up a bit but don't drive it then drain :thumbsup:

[online]

It drains better when warm, but more of the old oil will be in the head and galleries. Doing it after a drive means you leave a larger portion of the old oil in your engine :thumbdwn:. So best is to let the car sit for a while to let all the oil flow back down into the sump first. Then drain.

That doesn't make sense to me at all. hot oil will run down all oil galleries pretty damn quickly..

[teaseR]

That doesn't make sense to me at all. hot oil will run down all oil galleries pretty damn quickly..

but when the car has been sitting over night all the oil would be in the sump. so it wont be in the head and galleries. i do mine cold:thumbsup:

[HondaTechy]

Always try to get the car to normal operating temprature,after a good drive or after the cooling fans have cut in twice.when its hot the oil runs out quicker and more will come out then cold.cold oil thick and lumpy,hot oil is thin and runny.also if you have a air brake sucker you can also suck inside the sump to get to the rest of the oil.
http://www.ehow.com/video_11_change-motor-oil.html

[aaronng]

That doesn't make sense to me at all. hot oil will run down all oil galleries pretty damn quickly..
From what's I've seen by monitoring the dip stick level, it takes many minutes, at least for the K series. Maybe the D and B series have larger galleries.

[aaronng]

but when the car has been sitting over night all the oil would be in the sump. so it wont be in the head and galleries. i do mine cold:thumbsup:
That works as well. I'd prefer to drain my oil safe than get scalded by hot oil. To counter the effects of cold oil, I let it drain for longer. Usually have a cold one while letting it drip into the tray.

[aaronng]

Always try to get the car to normal operating temprature,after a good drive or after the cooling fans have cut in twice.when its hot the oil runs out quicker and more will come out then cold.cold oil thick and lumpy,hot oil is thin and runny.also if you have a air brake sucker you can also suck inside the sump to get to the rest of the oil.
http://www.ehow.com/video_11_change-motor-oil.html

Cold thick and lumpy if you are changing oil in winter and it is below 10 C. At normal 25 C weather, the oil is not lumpy (but still slightly thicker than a 100 C hot oil).

[HondaTechy]

Thats if you have time working at home.most good workshops will do it hot,it saves time and is better.

[destrukshn]

hot, people that burn themselves taking off the sump plug, should learn how to do it, without getting massive amounts of oil on them.
not hard.

[bennjamin]

just wear disposable gloves. Abit of oil on your finger thats it and chuck out the gloves later.

[HondaTechy]

or just get some soap.

[aaronng]

Thats if you have time working at home.most good workshops will do it hot,it saves time and is better.
Yeah, the hoist gives good clearance to use an extension with the socket. Plus, the oil drain stand with the wiremesh-equipped funnel lets you drop the plug in but not lose it in a sea of black hot oil.

[aaronng]

just wear disposable gloves. Abit of oil on your finger thats it and chuck out the gloves later.

I've tried that with warm oil and I can say that it doesn't do much for the heat. LOL. I'll probably use the socket+extension all the way until the plug falls into the drain tray and fish it out later.

[teh_mechanic]

pretty much as you can see guys its a personal thing,sure hot oil will drain at a faster rate,but cold oil will all be sitting in the sump ready to drain anyway.

i reckon,do it hot if you have the skill and equipment/adequate drain container so you wont get oil on you.

if its a hassle at home and you cant get much clearance and dont feel confident that you wont get oil on you,then do it cold.

the difference in drain temperature isnt going to make a noticeable difference to wear IMO.

only thing i can think of is maybe by taking the car for a drive first the oil will get agitated and swished around so more tiny microscopic metal particles will be mixed around the oil and end up coming out,rather than possibly sitting on the sump floor and maybe not coming out(reason why magnetic sump plugs were invented)

[destrukshn]

Yeah, the hoist gives good clearance to use an extension with the socket. Plus, the oil drain stand with the wiremesh-equipped funnel lets you drop the plug in but not lose it in a sea of black hot oil.
no, i can do it on the floor, using a jack and stands.
don't need a hoist
with practically getting no oil on me, and if any oil it would be equivalent to 2 drops on my fingers only, and still have the sump plug in my hands/fingers.
lol.

[aaronng]

Even with the underbody cover?

[destrukshn]

Even with the underbody cover?
lol, i'd never do it with the undertray on, why would you? takes 5 mins to take off, and makes life alot easier and cleaner.

[EuroAccord13]

Normally, I'd wait around 30 minutes before draining the oil both at home or in the workshop....

Most workshops do it right away so they can reduce TAT and do more cars...

[fatboyz39]

i like to do the oil when warm/hot.

[dsp26]

yep.. warm/hot. let it warm up (but not to operating temp) and let it sit for about 10-20mins.

i don't see how 5w30 or 10w30 stays in the head for long... but then again thats a non issue if you use a filter with anti-drain back valve like the pureone purolators.. and i think oem... ur always gonna have some oil in the head because this feature keeps it in there for safer cold start

[Lukezen27]

Well I'm going cold for the first time today...

Not bad not having to deal with the hot oil while under the car lol

I'm letting drain for longer than I would, 1 hour should be fine right?

[Lukezen27]

OK I recommend doing when your motors warm or hot...

Checked my oil via the dip stick and I can see bits of crap still in there...

This never happened any time I changed my oil after warming up my car...

Cheers

Luke

[Drew]

Do it when warm

No need to have it boiling hot

[Limbo]

warm it up then let it sit for 5mins and should be fine to drain

[55EXX]

first thing in the morning. oil has setted all down into the sump. the car is cool. no hot ehaust burnin my arm as i reach for the oil filter. easy.

[Weq]

omg lol this thread is funny.

Oil needs to be hot, otherwise u are wasteing your time.

Noobs. Its car maintance 101. RTFM before thinking your an engineer.

[Benson]

Do it when warm

No need to have it boiling hot

:thumbsup:

[EGJOE]

hi mate:wave:
I do mine hot. I do services for my mates rides all the time cause they don't have floor jack etc.
If the oil hasn't been changed for quite a while and is really black, I do a oil flush. What I do is drain the oil while its hot, then refill it with a cheapo oil like valvoline or something. Drive it around for 5 -10 min then i drain that and do my regular oil filter change and oil change i like to use full synthetic like motul or cast edge.
I find this works really well better then those oilflush additives for about same price. If really fussy chuck in oil flush additives when putting elcheapo oil in for ya flush. You'll find ya good oil wont go black so fast cause all the old crap is flushed out with cheap oil instead of mixing into your expensive premium oil.
My mechanic showed me this technic, try it out!

Cheers
EGJOE

[SHIFTY]

just do it when it is hot..but more regularly so that means the oil that doesnt drop is still good... ffs ur not driving F1 cars here there freaking honda's!:P

For me at work i do it when it is hot...

P.s it is good 2 see there is no noobs saying they like 2 run there car 2 help get rid of the rest of there oil... :P hahaha

[EGJOE]

Agreed do it more regulary:thumbsup:

EGJOE

[zuihoujueding]

my god. always change oil when warm. thats when the oil carries the yucky stuffs and flows out quicker. cold oil cant carry any yucky stuffs out of the engine.

[aaronng]

my god. always change oil when warm. thats when the oil carries the yucky stuffs and flows out quicker. cold oil cant carry any yucky stuffs out of the engine.

Not true.

[Zilli]

i always do it when its warm/hot... hot oil flows out better...

[nugget1]

I do it warm then let it drain for ages so the oil at the top of the motor comes out.

[trism]

warm it up, then crack the oil filter and oil filler. undo the sump plug, then take off the filter and the piller plug. let it drain out. use some cheapo oil, tip it straight down the filler, with the filter and sump plug out.wait till that runs out, then use your good oil and fresh filter

[aaronng]

warm it up, then crack the oil filter and oil filler. undo the sump plug, then take off the filter and the piller plug. let it drain out. use some cheapo oil, tip it straight down the filler, with the filter and sump plug out.wait till that runs out, then use your good oil and fresh filter

Why put the cheapo oil through? It won't take much dirty oil out except for that little bit in the galleries as it drains down and maybe a little bit in the sump....

[teaseR]

warm it up, then crack the oil filter and oil filler. undo the sump plug, then take off the filter and the piller plug. let it drain out. use some cheapo oil, tip it straight down the filler, with the filter and sump plug out.wait till that runs out, then use your good oil and fresh filter

geez... not like the fresh good oil is gonna stay clean forever. that 100ml of dirty oil wont hurt

[absolutR]

to get the maximum drainage i have always been told to do it cold, because when it has just been driven, the oil is dispersed over a greater area of the engine, so it wont all drain out, however if u wait till its cold all the oil comes to rest down the bottom of the engine, and more of these 'yucky stuff's have had the time to collect. when its hot it'll run out better but to get the maximum amount of oil out of your engine, let it all settle down to the bottom so u collect all the oil that is, when running, greatly dispersed

[driftr]

allways when its hot. wat i do is go down the road come back drain it for about 2hours so its totaly out then i put the sump bolt back on and put some new oil in and done:) thats the way i do it

[krogoth]

ok, ive only ever changed the oil of my lawn mower, lol as the car is still under warranty

a few comments....

i dont see the point of draining when hot at all

now, the oil pump pick up is in the sump right?

so when u turn off ur car, and leave it over night, alllllllllll the oil drains into the sump, and it drains for hours, since u left it at night

now isnt it better for the oil to drain overnight, than over 20minutes? u all say the oil is hot, it flows out better?

but wat is the difference between the oil collecting in the sump or the oil collecting in a container outside the car once u have turned it off?

nothing, IMO, please correct me if im rong

and by leaving it overnight, it can drain for far longer right? since the pick up is still in contact with oil, so ther wont be any priming issues with the oil pump later

the only reason workshops change the oil a few minutes after turning off the engine is coz they dont have time to sit around for hours waiting for the all the oil to come out

[destrukshn]

ok, ive only ever changed the oil of my lawn mower, lol as the car is still under warranty

a few comments....

i dont see the point of draining when hot at all

now, the oil pump pick up is in the sump right?

so when u turn off ur car, and leave it over night, alllllllllll the oil drains into the sump, and it drains for hours, since u left it at night

now isnt it better for the oil to drain overnight, than over 20minutes? u all say the oil is hot, it flows out better?

but wat is the difference between the oil collecting in the sump or the oil collecting in a container outside the car once u have turned it off?

nothing, IMO, please correct me if im rong

and by leaving it overnight, it can drain for far longer right? since the pick up is still in contact with oil, so ther wont be any priming issues with the oil pump later

the only reason workshops change the oil a few minutes after turning off the engine is coz they dont have time to sit around for hours waiting for the all the oil to come out
you do it when it's hot becuase it flows better.
also, you can leave it overnight if you want to.