- May 25, 2005
- ROCHESTER, NY
What do Nissan owners and others mean when they say that Nissan/Infinity engines like heavier weight oil? Do heavier oils like X-W-40,(compared to X-W-30) help to quiet the engines or make them seem more smooth, or is it that the UOA's show less ware? I've done a search and can't seem to come up with and answer, only the coments. Just what is the real deal here?