We tested Castrol EDGE in the industry standard Sequence IVA wear test, which was conducted at an independent third party testing facility. The results of the test proved no leading synthetic motor oil, not even Mobil 1, can provide better engine wear protection than Castrol EDGE.

How is Castrol EDGE different than Castrol SYNTEC?

Castrol EDGE is a completely different formulation than Castrol SYNTEC, which is comprised of a different mix of base oils. Castrol EDGE meets more specifications than Castrol SYNTEC, including GM 4781M and provides guaranteed engine protection for up to 24,000kms or one year, whichever comes first.

What makes Castrol EDGE an “advanced” synthetic?

Unlike regular oils such as Mobil 1 and Castrol SYNTEC, Castrol EDGE offers extended drain interval protection. It also provides an unsurpassed engine wear protection and meets the worlds toughest industry-performance standards. Because Castrol EDGE provides this combination of benefits, we call EDGE an “advanced synthetic”

• MYTH: Once I use synthetic motor oil in my car, I cannot switch back to conventional motor oil.
• FACT: Synthetic motor oils are compatible with conventional and part synthetic (blend) motor oils. However, synthetics deliver superior engine protection versus conventional oils.
• MYTH: Using synthetic motor oil will void my vehicle’s warranty.
• FACT: Using synthetic motor oil will not void your vehicle’s warranty. Synthetics are formulated to not only meet minimum required industry standards, but also, in many cases, meet tougher industry and vehicle manufacturer standards.
• MYTH: Synthetic oil is only for new cars.
• FACT: Quality synthetic motor oil can be used in old as well as new cars, including vehicles in which conventional oil was previously used. Synthetic motor oils are beneficial for the good health, long life and top performance of new and old cars.
• MYTH: You need to allow a break-in period for new vehicles before using synthetic motor oil.
• FACT: In the past, it was recommended that conventional motor oil be used for your first oil change to allow for some controlled wear to break-in the new engine. However, with current engine technology, a break-in period is not necessary. You can use synthetics immediately.