SAN RAMON − With the improved quality of modern synthetic oil products, many high-end auto manufacturers have extended their recommended oil change intervals. In some cases, manufacturers endorse driving for as many as 12,000 to 15,000 miles between services. This may be a good idea in theory, but in practice, it can lead to adverse consequences.
Over time, airborne contaminants cause engine oil to become dirty, regardless of whether it’s a synthetic or conventional product. So, if you keep the same oil in your car for 12,000 to 15,000 miles, you’ll allow that dirt to continue cycling through the engine, which will inevitably cause excessive wear and tear. To avoid this, skip the manufacturer’s recommendation and plan to have your oil changed every 5,000 miles.