My family has a dune buggy that has a rebuilt 1974 VW Beetle engine in it and I need to know what oil to use in it. The buggy was built w/ the frame and front/rear ends from a 65 VW as well as engine and tranny, but after having some problems with the `65 engine we put in this rebuilt 1600cc `74 engine. I'd guess we have about 600-750 miles on it (no odo of course). Its not really a beach buggy, we mainly just ride around town in it during the summer. We had the valves adjusted around 500 miles (or so we thought) of riding, and I believe the mechanic changed the oil as well. A VW specialist has done all of our work for us. We do a lot of short trip driving around town, practically no highway miles, and we take it to redline a lot.. love to hear the straight pipe roar Oh yeah, it has a slight valve tap as well. What oil should we start using? I just added some German Castrol 0w-30 into my Acura Legend last week and it quieted it down a lot, and everything is smoother, and I was considering that, but I wanted to check with everyone before I went and got a synthetic oil for this thing. What do you all say? Thanks!