The accumulation of contaminants and chemical changes in the motor oil eventually make it unfit for further service.
Foam in oil may lead to mechanical damage.
You don't need to do anything special before you switch to synthetic oil after having used conventional oil.
Spring and fall constitute “oil-change season” for many, but that schedule is more tradition than a maintenance imperative.
While it's safe to mix synthetic and conventional oil since they're compatible, here's why it's best to avoid it.
Motor oil myths abound. Here are five of the most persistent along with our myth-busting facts.
Natural-gas-based motor oil made using gas-to-liquid (GTL) technology may be interesting, but is it inherently better than other oils? Let's...
Find out everything you need to know about synthetic vs. conventional motor oil.
Industry testing shows that AMSOIL delivers excellent protection for turbo cars, limiting deposits on the turbo bearing and shaft. See...