901Memphis, as an aside- just sold 2000 Taurus wagon (24v) & just finished fixing (AC compressor+, windows, added tranny cooler) our 1999 Buick LS 3.8l. The truck new with whatever oil came with (2013 5.3l) got 20.7 mpg. Changed oil (Penzoil Synthetic Blend 5w30) @ 486 miles (break in), drove...