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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 Mon, Mar-09-2009, 09:28:08 PM   #31
EricSMG
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The term "Lifetime" is, by its very nature, totally undefined. That said, current automobiles typically have an estimated life span of somewhere between 150k and 200k miles. Most of us here will never come close to putting that many miles on one of these cars, which means "Lifetime" fluid is TOTALLY valid from that perspective.

My car currently has 58k miles on it. Do you really think changing the tranny fluid is gonna make a darn difference. I think not. Now, if I bought a car with say 125k I would probably change the fluid, just to feel better about myself.
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Old Mon, Mar-09-2009, 09:34:33 PM   #32
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I changed my SMG trans fluid at 62K and gold metal shavings were obviously present. The first thing I thought of when I saw the oil was Goldschlager. I am glad that I decided to go against the BMW service recommendations and swap it out.
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Old Mon, Mar-09-2009, 09:36:38 PM   #33
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I prefer Jagermeister
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Old Mon, Mar-09-2009, 11:03:48 PM   #34
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Test results at 15k miles showing unacceptable viscosity breakdown, excessive insolubles, excessive wear metals, etc. That is the bare minimum of what I think should be included before someone starts seriously challenging design decisions that were made by engineers that have already done this testing.

Sure it's eloquently put and it's somewhat logical (if you ignore that BMW's old intervals may have been excessively short in the first place), but without any proof it's just another well put together article that spreads fear, uncertainty, and doubt.
So send in your oil for analysis next time you change it? Make sure to get it checked for both it breaking down AND deposits in the oil (metal shavings, etc). I would, but I can't.... as I refuse to go that many miles between changes.

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Originally Posted by EricSMG View Post
The term "Lifetime" is, by its very nature, totally undefined. That said, current automobiles typically have an estimated life span of somewhere between 150k and 200k miles. Most of us here will never come close to putting that many miles on one of these cars, which means "Lifetime" fluid is TOTALLY valid from that perspective.

My car currently has 58k miles on it. Do you really think changing the tranny fluid is gonna make a darn difference. I think not. Now, if I bought a car with say 125k I would probably change the fluid, just to feel better about myself.
Actually, to the contrary: if I bought a car with 100,000+ miles on it, which had never seen fluid swaps on the diff or tranny, I would leave the fluids completely alone (diff and tranny fluids, that is). At that point you have to worry much more about dislodging globs of stuff that would really screw things up. I think 75k is about the highest millage I'd do a first swap on, after that I'd wait for component failure and then keep up to date with it after replacement.

.... sadly that's the exact state of my father's e46 330xi, which he bought used and has 95,000 miles on it.

For me, lifetime is going to have to be in excess of 200,000 miles. I've decided to go to dental school, so I'm going to be in this car for long time yet... it's got to last, and it's not like I drive it lightly
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Old Mon, Mar-09-2009, 11:26:39 PM   #35
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So send in your oil for analysis next time you change it? Make sure to get it checked for both it breaking down AND deposits in the oil (metal shavings, etc). I would, but I can't.... as I refuse to go that many miles between changes.
I change the oil once a year on roughly the same date out of convenience, so I never make it beyond 10-12k miles. If I put more miles on the car I'd take it 15k miles for sure and probably change the filter at 7.5k miles. Anyway, I don't think the burden of proof is on me. I trust that the people who can design an SMG system, VANOS, etc, know how to spec a fluid service life, so I'll give them the benefit of the doubt, if there is any.

Also, Mobil 1 has an extended life synthetic oil out right now that is recommended to use 15,000 mile intervals. If a company in the business of selling oil wants me to buy less of it, I have a very positive feeling that 15,000 miles isn't an unreasonable interval.
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Old Tue, Mar-10-2009, 12:51:20 AM   #36
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... Or maybe they want you to buy theirs over the competition

Either way, it seems even you aren't comfortable with recomended intervals, since you'd replace the filter if you drove more. Where's the faith in BMW engineers gone?
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Old Tue, Mar-10-2009, 02:20:29 AM   #37
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Originally Posted by Obioban View Post
So send in your oil for analysis next time you change it? Make sure to get it checked for both it breaking down AND deposits in the oil (metal shavings, etc). I would, but I can't.... as I refuse to go that many miles between changes.



Actually, to the contrary: if I bought a car with 100,000+ miles on it, which had never seen fluid swaps on the diff or tranny, I would leave the fluids completely alone (diff and tranny fluids, that is). At that point you have to worry much more about dislodging globs of stuff that would really screw things up. I think 75k is about the highest millage I'd do a first swap on, after that I'd wait for component failure and then keep up to date with it after replacement.

.... sadly that's the exact state of my father's e46 330xi, which he bought used and has 95,000 miles on it.

For me, lifetime is going to have to be in excess of 200,000 miles. I've decided to go to dental school, so I'm going to be in this car for long time yet... it's got to last, and it's not like I drive it lightly
Dental school...NICE! where you applying? maybe we can go together and work on our cars during the weekends lol

my cars approaching 50k.. so changing the SMG fluid, rear diff fluid, and an oil change is good to do right now.. ?

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Originally Posted by fat hal View Post
Also, Mobil 1 has an extended life synthetic oil out right now that is recommended to use 15,000 mile intervals. If a company in the business of selling oil wants me to buy less of it, I have a very positive feeling that 15,000 miles isn't an unreasonable interval.
you use mobil1 on your m3? cuz they dont make 10w60 oil which is what you need...
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Old Tue, Mar-10-2009, 01:11:07 PM   #38
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Either way, it seems even you aren't comfortable with recomended intervals, since you'd replace the filter if you drove more. Where's the faith in BMW engineers gone?
It's not that at all. I live in a high rise building, so my garage time is limited. I do my maintenenance over the Thanksgiving holidays because it works out best for my schedule. It would be a fairly major hassle for me to go out of my way to extend an interval.

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you use mobil1 on your m3? cuz they dont make 10w60 oil which is what you need...
no I use Castrol, it was just an example
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Old Tue, Mar-10-2009, 01:48:01 PM   #39
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Quote:
Originally Posted by beemerb0y View Post
Dental school...NICE! where you applying? maybe we can go together and work on our cars during the weekends lol

my cars approaching 50k.. so changing the SMG fluid, rear diff fluid, and an oil change is good to do right now.. ?
IMO, yes.

PMing you on the going back to school front, don't really want to discuss that in public
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Old Thu, Mar-12-2009, 04:58:44 AM   #40
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holy $hit.. the tranny fluid costs $128.13 and you need 2 bottles (or 3 to be safe)...

any alternatives? madrussian uses Royal Purple in his DIY, is this good? part #? thanks
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Discussing DIY SMG tranny fluid change 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)