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Toyota Rukus: 2AZ-FE oil consumption
The 2.4-litre 2AZ-FE engine is susceptible to excessive oil consumption due to oil getting past the piston rings and into the combustion chamber. There have been reports of excessive oil consumption for 2AZ-FE powered Rukus vehicles with mileages as low as 70,000 kms, though it is more commonly experienced from 100,000 to 120,000 kms.
In August 2011, Toyota issued the TSB #0094-11
which noted that 2006 to 2011 model year vehicles with the 2AZ-FE engine may experience excessive oil consumption. In TSB #0094-11, Toyota prescribed an oil consumption test in which oil consumption would be considered excessive if it exceeded more than 1 quart (approximately 1 litre) of oil for 1200 miles (1930 km) of normal driving. If this threshold was exceeded, the piston assembly (i.e. pistons and piston rings) would be replaced – this required the engine to be removed from the vehicle.
In January 2015, Toyota USA initiated a ‘Warranty Enhancement Program’ known as Limited Service Campaign (LSC) ZE7 for the 2AZ-FE engine. As part of this program,
- Toyota informed owners that they could seek reimbursement for the cost of previous repairs to address excessive oil consumption;
- Owners were advised that they could have an engine oil consumption test to determine if their vehicle was experiencing excessive oil consumption. It is understood that the threshold for this test was the same as described in TSB #0094-11 (i.e. 1 quart per 1200 miles); and,
- For vehicles with excessive oil consumption, the pistons would be replaced at no cost to the owner.
As part of the warranty enhancement, the ‘Primary Coverage’ period lasted until October 31, 2016, regardless of mileage. Once the ‘Primary Coverage’ period ended, a ‘Secondary Coverage’ period commenced and was applicable from ten (10) years from the date of first use or 150,000 miles (241,350 kms), whichever occurred first.