STAGE 0 - before tuning
Here is a summary of recommendations that should be followed before any modification - increase - performance. These recommendations can safely achieve the performance that is required. However, these recommendations can also serve as a guide for extended maintenance to get the engine back to what it has lost in years of operation. These recommendations not only restore original performance, but also extend engine life.
- engine oil change, oil leak check
 - oil filter replacement
 - air filter replacement
 - fuel filter replacement
 - turbocharger check / check - WasteGate adjustment
 - TCV (turbo control valve) inspection / replacement, leak inspection / vacuum tube replacement
 - Injector Inspection / Inspection - Spark Plug Replacement
 - clean / check for leaks / replace suction hoses
 - tightness check of the intercooler
 - check / clean the crankcase ventilation
 - Changing the transmission oil
 - slip control / clutch change
 - leak check / cleaning of the cooling system
 
Subsequent to modification and after performing STAGE 0, we recommend a follow-up service plan that certainly will not harm cars without 
modification.
- Change engine oil after 15,000km or 1 year (10,000km recommended)
 - Replace air filter after 30,000km (20,000km recommended)
 - Change the transmission oil after 50,000km
 - Use quality fuel (Benzina, Aral, OMV,…)
 - Drive reasonably - gradually warm the engine / cool down the turbo before turning off the engine
 - Set WasteGate to the correct pressure according to your tuning stage
 - Check the brakes and inflate the tires at least once a month
 - Do not forget the other refills - servo, differential, angle gearbox, haldex,…