Wow, That is rather limited criteria. I have run both, although Valvo has a poor rep and GTX seems to get good reports, both are overpriced for what you get. You can't go wrong with either, my prefernce is niether, the valvo seems to thin out real early and the GTX seems to darken in the motor very early(yeah, it's not scientific and is probably meaning the oil is working but you know what Granpa taght us?)quote:
Originally posted by simple:
Which would be more preferred? These are the only two choices also. From what I've been reading on this site, it seems like valvoline is not that preffered. However, looking at the product data sheets for both products it seems like the edge goes to valvoline when looking at certain areas.
If indeed those are your only two choices buy the cheapest.
There are better choices for less however as was mentioned above.