One problem related to engine oil leaking has been reported for the 2010 Chevrolet Cobalt. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Chevrolet Cobalt based on all problems reported for the 2010 Cobalt.
Purchased car used 4/2014. Oil leak reported to dealer and repaired 4/2014. Car taken back to dealer for service 8/2014 for continuing oil leak. Per dealer, engine was badly cast, causing it to be porous. Oil was weeping through engine block. Entire engine now being replaced under warranty. No recall notice for this problem.