GDI engine oil consumption / rare knock.
- Typically appears
- 70,000+ miles
- What to inspect
- Check oil level and listen for knock.

A 2018 Kia Forte is now 8 years old, so an average example has covered around 108,000 miles. The final model year of the generation · generally the most sorted build, so mileage, servicing and condition matter more than build-year faults. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2018 car has usually reached the mileage where they appear.
Compiled & reviewed by the VehicleFaults Research Team
The 2018 Kia Forte is 8 years old, so an average example has covered roughly 108,000 miles. At that mileage 2 of the documented faults are already due, so check those first.
Documented onset mileage is at or below the ~108k miles an average 2018 car has covered.
GDI engine oil consumption / rare knock.
AC performance drop.
Age, electronics and build-related issues that are not mileage-driven.
Automatic / dual-clutch shift quality.
Paint chipping and interior rattles.
Generate a tickable pre-purchase checklist for this exact year, mileage and variant · add photos and notes as you inspect.
Check this exact carDecent value; monitor the GDI engine's oil use and check service history.
Some GDI engines consume oil; check the level between services.
Yes — economical and inexpensive to maintain if the engine is healthy.