Can paraffinic base oils cause wax buildup and sludge?
No. All high quality petroleum motor oils are made from paraffinic base oils. In spite of its name, “paraffin” does not mean candle wax. The stability of paraffin molecules makes paraffinic base oils more resistant to the chemical changes that can take place in an engine than other types of base oils. That means less sludge, varnish and corrosive wear with a high quality paraffinic base motor oil.
