TipRequest the formal GM oil consumption test (PIP4656D) at your dealer. The dealer fills oil to the full mark, documents mileage, then you return at 3,000 miles for a measurement. If consumption exceeds 1 qt/2,000 miles, GM authorizes piston ring replacement under the 5yr/60k powertrain warranty or Extended Powertrain warranty (GMPP). Without this documented test, GM will reject warranty claims — many dealers try to skip it. Insist the test be performed.
TipCheck oil level every 1,000 miles without exception on any 2010-2017 Terrain with the 2.4L. Running the engine even 1 quart low significantly increases oil pressure and bearing wear risk. Many engine failures on these trucks occur not from the oil consumption itself, but from owners trusting the oil life monitor (which measures condition, not level) and not checking dipstick level between changes.
NoteBurning oil on the 2.4L saturates the catalytic converter with unburned hydrocarbons, eventually destroying it. A new catalytic converter runs $800-1,500. If you've had an engine with known oil consumption for 40,000+ miles without addressing it, have the cat inspected before it fails and damages the O2 sensors downstream. Replacing the cat without fixing the oil consumption will destroy the new cat within 30,000-40,000 miles.
