There are three key reasons why the transition to synthetic oils is occurring. They are the proliferation of smaller displacement turbocharged engines, escalating CAFE fuel economy requirements, and government regulations to lower tailpipe emissions.
Synthetic Oils, Higher Labor Rates Increase Preventive Maintenance Costs
On average, PM costs have increased due to higher labor rates, expansion of models requiring synthetic motor oil, and more expensive cartridge oil filters. One offset is that longer lasting synthetics have extended oil-drain intervals.