Lube oil specification is stated in the vehicle owner's manual. Synthetics may be expensive, but it doesn't necessarily follow that it is the best oil for all engines.
as per my checking, wala pa po CL-4 plus na rating ang American petroleum Institute(ApI). Only CI-4 plus....the latest is still CJ-4..![]()
...CL-4 plus is an official API oil service specification, it was introduced in 2004 as an enhanced CL-4 (introduced in 2002) category). If I can remember it right, the same ASTM tests are used with the following modification/s:
1. The time in which the candidate oil is tested is prolonged.
2. The wear allowed is reduced.
3. The harsh conditions e.g. corrosive potential, in which the candidate oil is subjected are intensified.
4. Soot control requirement is enhanced.