Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Additives

Additives are chemicals that give fresh engine oil its custom-made properties. Although used in small amounts, they provide a tremendous boost to the performance abilities of engine oil. They, in fact, represent the major difference between the oils of the early 1940's and the highly advanced prescription oils of today.