Adding Sea Foam to oil in a 2003 VW Jetta TDI [SOLVED] Asked by Ben B. In Minnesota Can I add Sea Foam to crankcase oil of a 2003 VW Jetta TDI?
Hi Ben. Yes, you can add Sea Foam to the oil of your 2003 Jetta. Sea Foam is safe and effective in all types of motor oil, synthetic and conventional.