Did a Blackstone UOA last summer, but decided to switch it up to Wix this time since it was half the price. Blackstone at 5,000 miles came back all good except fuel dilution thinned the viscosity some. They recommended pushing it to 7,000-7,500 which is right in line with the OLM for the Terrain. I decided to push this one to 6250 and Wix came back with "Caution" because the viscosity had thinned, it didn't say it was because of fuel dilution, but that is my assumption. This is known issue with the 2.4 EcoTech engines, but Wix seems to be more concerned about it than Blackstone was.