is havoline deposit shield 5W30 the same as chevron supreme? was gonna run this oil in a friends car, a 2008 sentra, she can get the oil at a good price, but i always hear how the havoline and chevron oils are thin and shear to a 20 wt. gonna do 4k ocis on this car ,and it usually takes her 4 to 5 months to put 4k miles on the car, alot of short trips. would this oil be good or should i go to Pennzoil Conventional 5w30?