Paul, I use VR-1 30 weight. I'm not a fan of using synthetics in engines which were not designed for synthetics for a variety of reasons. The big thing (to me) in oil today is the absence of zinc and VR-1 still has as much as Valvoline can get away with using...along with other higher priced and more hyped and advertised options, of course. You may hear lots of differing opinions regarding synthetic oil. You can find lots of information regarding this online, but there's also a lot of misinformation. I'd suggest researching the effects of the lack of zinc first. Not to say that's a big deal with the 235, but it is nevertheless a consideration.
