Malaysian palm oil futures saw a fourth consecutive session of gains, rising 0.82% to 3,925 ringgit ($915.99) a metric ton, driven by stronger vegetable oil prices on the Dalian exchange. However, the ringgit's strength capped the gains. Indonesia plans to increase its crude palm oil export levy to finance a higher biodiesel blending mandate from May 17. Meanwhile, Malaysia's palm oil stocks hit a six-month peak in April due to surging production and declining local consumption.