[mightbaal]

Alright well I'm looking for people with high miles running good amounts of boost to the car. I am almost at 70k now I use about a quart of oil every 4000-5000 miles but I am not that easy on my car. I bought my car with 55k on it and did mods right off the bat. I am not scared of transmissions turbos differentials and other things. What I worry about is engine failure its the only thing I do not want to deal with... talking spinning rod bearings head gaskets and things of that nature is what fears me. Anything else I can tackle pretty much my warranty goes till I think 102k or something. I run a E85 backend flash with some mods FMIC Chargepipe DCI JB4 etc running E55 on Map 7 (almost 20 psi). I want to keep this car until 200k if possible but I am all modded up not sure longevity of these N54 motors. I know how much of a pain the car can be with fuel pumps going injectors coils all that and I keep up with all my fluid changes. Is it possible to hit 200k on these engines with power and a enthusiast driving nature?

[Gohan335i7]

I hope it's possible! I heard of some going up to 250-350k, but I am not sure if they were modded or not TBH. I am sure if you take really good care of preventative maintenance & have a list from A-Z of what needs to get done every year or 2, our N54s should last at least that long. Maybe even 400-500k!?:O Time will tell.

[hellokitty]

Originally Posted by mightbaal

Alright well I'm looking for people with high miles running good amounts of boost to the car. I am almost at 70k now I use about a quart of oil every 4000-5000 miles but I am not that easy on my car. I bought my car with 55k on it and did mods right off the bat. I am not scared of transmissions turbos differentials and other things. What I worry about is engine failure its the only thing I do not want to deal with... talking spinning rod bearings head gaskets and things of that nature is what fears me. Anything else I can tackle pretty much my warranty goes till I think 102k or something. I run a E85 backend flash with some mods FMIC Chargepipe DCI JB4 etc running E55 on Map 7 (almost 20 psi). I want to keep this car until 200k if possible but I am all modded up not sure longevity of these N54 motors. I know how much of a pain the car can be with fuel pumps going injectors coils all that and I keep up with all my fluid changes. Is it possible to hit 200k on these engines with power and a enthusiast driving nature?

What oil do you use?

[mightbaal]

Originally Posted by hellokitty

What oil do you use?

Used to use Mobile 1 0w-40 Euro until they lost the LL-01 Now I'm actually switching to Castrol 03101 EDGE 0W-40 Synthetic Motor Oil European stuff.

[Wolf 335]

Other than just the common regular every day stuff such ass...

injectors
ignition coils
valve cover gasket
valve cover cracking
pcv system clogging up
fuel pump failure
water pump failure
oil filter housing gasket
radiator cracking
mechatronic sleeve leaking
turbo waste gates rattling
oil pan gasket leaking
HVAC fan rusting and making noise
radio display pixels fading

...car is pretty solid and should take you well into the 300,000km

(may have missed a few items up top but you get the point. I did see two threads about spun rod bearings)

[Wilt]

Part of the question at hand is

• What does higher compression do to accelerating the bearing wear to all bearings in the piston rod, crankshaft, and engine main bearings?
• What does higher compression do to the stressing of engine gaskets and seals?
• How much harder do you rountinely drive the engine simply because you are impressing yourself with the higher output of the tuned engine?

[Fundguy1]

I've got 226k. Had it running 17psi it's whole life with no problems that weren't common or more frequent than bone stock cars. I use the power continuously and feel it should have come this way from the factory but BMW didn't want to kill their M3 sales so they put a granny tune on it to make it the mid power option.

I did just blow the motor but that was in testing running a new setup with upgraded everything, about 30 psi boost, and an improperly tuned fuel rail. It dumped gas into the cylinders at full bore and detonated it under pressure blowing the rings. I'm putting in a 52k block now with the correct tune and same setup and plan on going another 200k as a dd with 650-700 hp. Dyno is early next week.

[NiNeTyOne]

Liqui-Moly & their Ceratec are both a major win in the bearing wear and engine life department.

We had used other oils in the race engines and shifted to this a while back and bearing wear was INCREDIBLY good with this combination on the endurance motors. Note that oil change frequency is also a factor as the filter can only do so much.

[924er]

It all comes down to preventative maintenance and pure luck. You don't care about transmission or turbos going out? Both of those cost as much as the motor lol

Not sure why you are loosing a quart of oil. Did you ever check for a valve cover gasket or oil filter housing gasket leak? Just cuz there is no leak on the floor doesn't mean shit

[924er]

Originally Posted by Fundguy1

I've got 226k. Had it running 17psi it's whole life with no problems that weren't common or more frequent than bone stock cars. I use the power continuously and feel it should have come this way from the factory but BMW didn't want to kill their M3 sales so they put a granny tune on it to make it the mid power option.

I did just blow the motor but that was in testing running a new setup with upgraded everything, about 30 psi boost, and an improperly tuned fuel rail. It dumped gas into the cylinders at full bore and detonated it under pressure blowing the rings. I'm putting in a 52k block now with the correct tune and same setup and plan on going another 200k as a dd with 650-700 hp. Dyno is early next week.

How many sets of turbos did u use to reach 226k ?

[BeastMode335i]

Originally Posted by 924er

How many sets of turbos did u use to reach 226k ?

They were stock

[Fundguy1]

Originally Posted by 924er

It all comes down to preventative maintenance and pure luck. You don't care about transmission or turbos going out? Both of those cost as much as the motor lol

Not sure why you are loosing a quart of oil. Did you ever check for a valve cover gasket or oil filter housing gasket leak? Just cuz there is no leak on the floor doesn't mean shit

Transmission is fine for the power. If you're 500hp or less auto is sturdy enough. I have the manual Just put in a motiv/PTF dual disc clutch and dmfw. The oem clutch had the full 226k and had meat on it still after all the miles. Only Trans I've heard failing are autos with big 500+ hp with no upgrades.

[mike@x-ph.com]

120k miles here

Have been running 20 psi boost for 2 years ... Ran ~22 psi for a while as well

[Fundguy1]

Originally Posted by mike@x-ph.com

120k miles here

Have been running 20 psi boost for 2 years ... Ran ~22 psi for a while as well

You're like a crazy person!

[mike@x-ph.com]

Originally Posted by Fundguy1

You're like a crazy person!

The extra power is addictive

[antonmn]

At 155,000 on my 335i. Did an oil analysis and the wear metals were low on a 10,000 miles interval. Like pretty much every BMW, the engines are pretty solid. The only thing that wears is the owner's patience as everything connected to the engine fails. But that's pretty much any car these days.

[mightbaal]

Originally Posted by 924er

It all comes down to preventative maintenance and pure luck. You don't care about transmission or turbos going out? Both of those cost as much as the motor lol

Not sure why you are loosing a quart of oil. Did you ever check for a valve cover gasket or oil filter housing gasket leak? Just cuz there is no leak on the floor doesn't mean shit

Its easier and cheaper to replace a transmission and turbos vs these motors the price on the motor is like hella expensive on these cars used. I was told 1 qt is normal for oil in 4k-5k. Might have the OFGH leaking I think see minor seepage in that area nothing shows under the belly pan or on the ground and I just had it off to do my FMIC.

[Fundguy1]

They're all about the same price. New turbos, used Trans or engine. My engine was $3k +labor. 2 yr warranty unlimited mileage

[mightbaal]

Originally Posted by Fundguy1

They're all about the same price. New turbos, used Trans or engine. My engine was $3k +labor. 2 yr warranty unlimited mileage

New engine? How many hours of labor tho on that?

[Gizm0]

150k miles on mine. I bought it with 65k miles and tuned it at 70k. Running FBO 17psi and 20psi sometimes on e70 mix.

No major problems, just the normal stuff for n54s (injectors, coils...)

I replaced the water pump at 140k miles as a preventative maintenance, it had never been replaced...

[M335Xi]

Originally Posted by NiNeTyOne

Liqui-Moly & their Ceratec are both a major win in the bearing wear and engine life department.

We had used other oils in the race engines and shifted to this a while back and bearing wear was INCREDIBLY good with this combination on the endurance motors. Note that oil change frequency is also a factor as the filter can only do so much.

Hear good things about Ceratec as well, bought a bottle today to try it in the next oil change.

[NiNeTyOne]

Originally Posted by 924er

How many sets of turbos did u use to reach 226k ?

My S4 had twin BW K04's pushing 23# tapering to 19 and I had 250,000 miles on it when I rebuilt the turbos with new CHRA's and only then due to a filter failure which allowed a small bit of grit to get into the intake and ruin a blade on one turbo. They were still tight in terms of oil, BUT I was maniacal about getting the oil temp up to operating before putting the car into boost, and I had an after run pump on the coolant to help with cool down.

That car probably had 40 track weekends on it as well. I hate to even think how many sets of Hoosiers I ate with that car.

Again, I ran LiquiMoly the car's entire life, changed every 3500-5000 miles depending on abuse, and was using Ceratec every third change after it came on the market.

What kills turbos is abuse, and the worst kind of abuse comes from hammering them cold. Impulse control is your turbos' best friend.