I have a 2001 Beetle TDI and needed to change oil so all I had quick access to was a Valvoline Heavy Duty Diesel 15-40 Oil now I changed the oil filter like I always do but should I be concerned about using this instead of the Rotella 15-40 fully synthetic diesel oil that I usually use?
Is synthetic blend oil in over 200,000 miler TDI good or bad or indifferent?
