- Water Crafts
currently: 96 XP, 98 GSXLTD
Past skis:96spx,97spx,96xp,00rxdi,18GP1800,00GP1200, 96gsx, waveventure
My mechanic who rebuilt my entire engine said use a tank or two of castor oil before switching to synthetic? This is a premix ski. What is the benefit? Will it hurt it if I just use synthetic right from the start?