My 2004 Ford Lariat has a 5.4 3 valve engine. It has about 51,000 miles on the truck. The past owner died in 2009. The truck sat in the widows garage until she traded it in last year at the Ford dealership I work at. After it went through the used car check and repair process I told my boss I wanted to buy it. The tech that did the oil change said the oil was very nasty. He said it looked like the oil and filter was there from 2009. Anyway, the shop foreman said the VCT solenoids need to be changed but said he wouldn't mess with it. Just drive it. I was wanting to know if a 0w30, or a 0W40 oil will be ok to use in it to make the noise quiet after it warms up? I'm using 5W20 bulk and a MC oil filter.