MECACYL HJD has been developed as protection for diesel engines and injection systems in addition to MECACYL CR. Its immediate effectiveness makes it an exceptional product for the protection of diesels.
 The use of MECACYL HJD hyper-lubricant has the following effects:
 - Protection of injection from contaminants (water, impurities, etc.)
 - Limitation of clogging of peripherals (EGR, FAP, catalytic converter, etc.)
 - Reduction of exhaust fumes
 - Silence of injection operation
 - Passage to anti-pollution control
 - Clean combustion
 Therefore, MECACYL HJD is the ideal complement for passing technical inspection.