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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > Best Service Intervals for FBO Tuned N55
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      02-20-2017, 10:10 PM   #1
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Best Service Intervals for FBO Tuned N55

So I have a FBO N55 motor with a custom flash on it, and wanted to know when the best intervals are for fluids and filters. I know with the mods I have, it pushes the car harder meaning more frequent services, but wanted to know exactly when those would be. Things I'm interested in are:

Oil:
Transmission Fluid:
Differential Fluid:
Transfer Case Fluid:
Power Steering:
Coolant:
Brake Fluid:
Fuel Filter:
Spark Plugs:

Anything else I'm forgetting?
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      02-20-2017, 10:24 PM   #2
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Quote:
Originally Posted by GTBrandon View Post
So I have a FBO N55 motor with a custom flash on it, and wanted to know when the best intervals are for fluids and filters. I know with the mods I have, it pushes the car harder meaning more frequent services, but wanted to know exactly when those would be. Things I'm interested in are:

Oil:
Transmission Fluid:
Differential Fluid:
Transfer Case Fluid:
Power Steering:
Coolant:
Brake Fluid:
Fuel Filter:
Spark Plugs:

Anything else I'm forgetting?
Oil: 5000km if driven hard, 7500km if most highway and barely driven hard.
Transmission Fluid: 65,000 miles
Differential Fluid: 65,000 miles
Transfer Case Fluid: 65,000 miles
Power Steering: None, it's electric, swap the belt every 60,000 miles
Coolant: 30,000 miles or once a year if you track alot
Brake Fluid: Same as Coolant.
Fuel Filter: 50,000 miles
Spark Plugs: depending on what boost you're pushing, normally 25,000 miles if stock plugs, 30-35,000 miles for iridium.
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      02-21-2017, 04:30 AM   #3
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Quote:
Originally Posted by GTBrandon View Post
So I have a FBO N55 motor with a custom flash on it, and wanted to know when the best intervals are for fluids and filters. I know with the mods I have, it pushes the car harder meaning more frequent services, but wanted to know exactly when those would be. Things I'm interested in are:

Oil:
Transmission Fluid:
Differential Fluid:
Transfer Case Fluid:
Power Steering:
Coolant:
Brake Fluid:
Fuel Filter:
Spark Plugs:

Anything else I'm forgetting?
Quote:
Originally Posted by chaungo View Post
Oil: 5000km if driven hard, 7500km if most highway and barely driven hard.
Transmission Fluid: 65,000 miles
Differential Fluid: 65,000 miles
Transfer Case Fluid: 65,000 miles
Power Steering: None, it's electric, swap the belt every 60,000 miles
Coolant: 30,000 miles or once a year if you track alot
Brake Fluid: Same as Coolant.
Fuel Filter: 50,000 miles
Spark Plugs: depending on what boost you're pushing, normally 25,000 miles if stock plugs, 30-35,000 miles for iridium.
Oil: Every 5000 miles if tracked. Every 7500 if not.
Transmission Fluid: Every 50,000 miles.
Differential Fluid: Every 50,000 miles unless you have a clutch based LSD. In that case, every 25,000 if you track.
Transfer Case Fluid:
Power Steering: Belt - every 100,000.
Coolant: Every 50,000 even under tracking conditions.
Brake Fluid: Every 6 months with standard brake fluid. Every 12 months with Castrol SRF.
Fuel Filter: Not necessary.
Spark Plugs: Every 50,000 for stock powertrain.

If you just DD your FBO N55, you're not pushing it harder than a stock N55 that is being tracked at HPDEs.

If you decide to track a FBO N55, that's an entirely different ball game in terms of wear and tear.
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      02-23-2017, 03:06 PM   #4
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I gotta ask. What does FBO stand for??
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      02-23-2017, 03:59 PM   #5
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Quote:
Originally Posted by Rick4345 View Post
I gotta ask. What does FBO stand for??
Full bolt ons - typically meaning:

Front Mount Intercooler
Upgraded Intake
Catless/High-Flow Downpipe
Upgraded Chargepipe

Could also include upgraded oil cooler, but typically not unless the car will be seeing the track pretty often
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      02-23-2017, 04:05 PM   #6
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I gotta ask. What does FBO stand for??
Full Bolt On.
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      02-23-2017, 05:04 PM   #7
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Thanks!! Another mystery solved. ?
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