I bought a new 2015 Equinox with the 2.4 Ecotec engine. Running about 45 mph up a mild incline sometimes the drone would rear its head and even make an oscillating sound (almost like a European siren). I changed the oil to QSUD and the drone seemed to be worse. I bought some Total FGC and so far the drone seems greatly reduced, and it feels quite smooth. Both oils were at the recommended 5w30. Is anybody else using Total oils? if so please share your opinion.