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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sun, Jan-14-2018, 02:17:35 AM   #21
Jasoncor
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Default Re: Oil change before or after car sits for awhile?

I do it before and drive it a little and let it cycle through the engine. I think that makes the most sense.
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Old Sun, Jan-14-2018, 04:15:44 AM   #22
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Default Re: Oil change before or after car sits for awhile?

Engines sit for years and with some pentrating oil in the cylinders and a hand crank to ensure nothing is bound up restart fine, so corrosion isn't an issue.
Also, even the best synthetics will "wax up" if they sit for a couple days or more under freezing. So I'd always do after if in anywhere near cold weather.
For before, I'd probably put in a good quality, 0w-30 dino or synthethic oil to:
1. get the dirt flushed out
2. get me the best possible flow for the first start after sitting; THIS is where wear occurs, at startup. The colder it is, the worse the wear.
All your going to do is get it hot and flush it anyway when you return.

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Old Sun, Jan-14-2018, 05:18:39 PM   #23
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Default Re: Oil change before or after car sits for awhile?

While were on this topic, for those changing after, I’ve been wondering should we do the oil change immediately? Before ever starting the car or should we drive it first? I know hot oil changes are better. But what’s everyone’s opinion on this?


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Old Sun, Jan-14-2018, 05:30:50 PM   #24
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Default Re: Oil change before or after car sits for awhile?

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Originally Posted by Joshe46 View Post
While were on this topic, for those changing after, I’ve been wondering should we do the oil change immediately? Before ever starting the car or should we drive it first? I know hot oil changes are better. But what’s everyone’s opinion on this?


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You're over-thinking this.

Your oil hasn't suddenly become poisonous over the winter.
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Old Sun, Jan-14-2018, 05:51:01 PM   #25
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Default Re: Oil change before or after car sits for awhile?

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Originally Posted by lmtfi View Post
You're over-thinking this.



Your oil hasn't suddenly become poisonous over the winter.


Lol alright! But I don’t mean that as if the oil is no good, but in terms of minimizing wear on the initial start up after 5 months. A fresh oil change would at least splash some oil up top.
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Old Sun, Jan-14-2018, 08:50:03 PM   #26
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Default Re: Oil change before or after car sits for awhile?

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Originally Posted by Joshe46 View Post
Lol alright! But I don’t mean that as if the oil is no good, but in terms of minimizing wear on the initial start up after 5 months. A fresh oil change would at least splash some oil up top.
Which is where the pre oiler comes in, it doesn't just splash little bit around, it primes every moving part in the engine so it is fully coated in lubricant
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Old Sun, Jan-14-2018, 10:20:58 PM   #27
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Default Re: Oil change before or after car sits for awhile?

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Which is where the pre oiler comes in, it doesn't just splash little bit around, it primes every moving part in the engine so it is fully coated in lubricant


Never knew that!
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Old Sun, Jan-14-2018, 10:56:21 PM   #28
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Default Re: Oil change before or after car sits for awhile?

I would definitely change it before you go. I used to race in the summer and old oil that sits in the engine will release acids and other chemicals that can eat away or pit on the close tolerance parts.


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Old Mon, Jan-15-2018, 12:10:11 AM   #29
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Default Re: Oil change before or after car sits for awhile?

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Originally Posted by lmtfi View Post
You're over-thinking this.

Your oil hasn't suddenly become poisonous over the winter.
A few years back my logic was to change after winter to remove any water condensate after sitting
Currently my logic is to change before (Michigan winter in my case) to remove oil with combustion products and maybe reduce corrosion anywhere the oil sit in pocket
One might deduce that there is no right or wrong…. Pick your logic….
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Old Mon, Jan-15-2018, 12:16:54 AM   #30
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Default Re: Oil change before or after car sits for awhile?

Quote:
Originally Posted by Joshe46 View Post
While were on this topic, for those changing after, I’ve been wondering should we do the oil change immediately? Before ever starting the car or should we drive it first? I know hot oil changes are better. But what’s everyone’s opinion on this?


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Yeah warm oil drains better but chances are with the car sitting for some length of time. Most of the oil is down in the pan. I change mine just before the first start. At least there will be some oil at the top and in the filter area this way.

But I just do both. Before and after lol
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Discussing Oil change before or after car sits for awhile? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)