You could use whats been suggested above or you could go with some Penrite 10TENTHS 10W40 Racing Oil like I have, I spoke directly to the rep at my work and he said that it is a Zinc based oil and therefore means it is a 100% shear free guaranteed oil, meaning that no matter how hard you push your engine or drive it, it will not wear your engine out, now this is backed up by a guarantee so however skeptical I was at first for them to guarantee it rather than just speculate I'm rather shocked. I've only had it in the car for about a week and I've already doubled my fuel economy with an average of 600km per tank over my measly 280-315km when I was using Castrol Magnatec semi-synthetic 10W40. I've also noticed I have a much smoother feeling and sounding drive with less engine noise. I know its expensive at $70 a bottle but I'd say its worth it in the long run for sure.