exporters & wholesalers quickly on Made-in-China. · DISCUSSION. The result of the performance evaluation test carried out on the fabricated palm kernel shells grinding machine using local raw materials as indicated in Table 3 shows that there was great size reduction in the initial size of the palm kernel shell with 97.7% (average grinding efficiency) reduction in size. · The answer is a definite no. When Shell first started evaluating multigrade aviation piston-engine oils over 25 years ago
