What kind of oil should be used for turbocharged engines?
2 Answers
Turbocharged engines use fully synthetic oil. Fully synthetic oil is artificially manufactured oil, which is produced by chemically decomposing natural substances and then synthesizing them with various other substances to finally produce synthetic oil. Fully synthetic oil has more stable chemical properties and lower resistance, which can reduce fuel consumption while providing better engine protection. A turbocharged engine refers to an engine equipped with a turbocharger, which is essentially an air compressor that increases air intake by compressing air. It utilizes the inertial force of exhaust gases expelled by the engine to drive the turbine in the turbine chamber, which in turn drives the coaxial impeller. The impeller then compresses the air delivered through the air filter pipeline, pressurizing it before it enters the cylinders.
I've got plenty of experience choosing engine oil for turbocharged cars. I used to go cheap with conventional mineral oil, but ended up with extremely loud engine noise during highway driving. The dealership mechanic said the oil film couldn't withstand the high temperature and RPM of turbocharging. Now I strictly use full synthetic oils, typically with viscosities like 5W-30 or 0W-40, such as Shell Helix Ultra or Mobil 1. Two key specifications matter most: first, the API SP rating shouldn't be lower, preferably SN PLUS or above; second, certifications like ACEA C2/C3 - these oils contain specially formulated anti-wear additives and detergents designed for turbochargers' harsh operating conditions. Remember to change it every 8,000 km or so - don't wait until the oil turns black and sludge clogs the oil passages. Also, it's best to warm up the engine for 30 seconds before winter starts to ensure proper lubrication of the turbo bearings.
