Hi all.

Today I changed engine oil. Finally I used Repsol Elite TDI 15W40 (CF-4/CF).

Price is half than HD360 oil.

The same power, same sound, same feel than using Spectro Heavy Duty 20w50.

I guess there are too much myths with these engines...

I want try another oil for primary... maybe a 20w50 for gas engine??? :p

15/40 is probably too light for that engine, you should use 20/50. Especially with the higher temperatures of Spain.

Also beware of warranty issues if you get a problem.