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Istanbul · Monday–Saturday 09:00–18:00 (TR time) · Remote service by appointment
Servicing a tuned BMW: plugs, oil and fuel
A properly prepared tune does not strain the engine; good servicing keeps it running trouble-free for years.
Spark plugs
At higher boost the ignition system works harder. A worn plug that goes unnoticed at factory power misfires under high load. We recommend changing plugs at the manufacturer interval, preferably a little sooner.
Engine oil
Use BMW-approved oil of the correct specification and do not delay changes. Oil quality matters both for VANOS working properly and for resistance to low-speed pre-ignition.
Fuel
Use the fuel quality the calibration was prepared for. Lower-quality fuel makes the engine’s protection systems step in and costs power.
Air filter and boost hoses
A dirty air filter makes it harder for the turbo to reach target boost. Have the hoses and clamps between turbo and throttle checked at each service; a boost leak is the first problem you notice at raised power.
Keep an eye on fault codes
You can read fault codes for free with the MOSTUNED app. If you see one, look it up in our fault code guide or send it to us on WhatsApp.
Frequently asked questions
Does a tuned car need more frequent servicing?
Intervals largely stay the same; sticking to the manufacturer intervals for plugs and oil, ideally a little early, is enough.
Read next
- BMW fault codes — Meaning and causes
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- All posts — Blog
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Not sure?
Send your model, hardware and goal — we will pick the right package together. We do not sell what does not fit.