Yes, simple recommendations are authorized, but they cannot be obligatory. Vehicle manufacturers can only impose minimum quality and performance levels (API, ACEA, manufacturer standard, etc.).
Source: UEIL Brochure 2011
Yes, simple recommendations are authorized, but they cannot be obligatory. Vehicle manufacturers can only impose minimum quality and performance levels (API, ACEA, manufacturer standard, etc.).
Source: UEIL Brochure 2011