Hello, and thanks for all the help so far... I have 3 questions, and would like your opinions/suggestions. 1) Where can I buy Amsoil oil? I live in Oak Ridge, TN. is it available at napa stores? Which Amsoil(type and weight) will be best for my 1997 Ford 4.6L v8, 82,000 miles? [I drive ca. 50 miles a day at average 45-50 mph, sometimes 65-70. Filter: Motorcraft FL-820S] 2) Has anyone used BG 44k? any good results? is an oil change neccessary after using it? how about Amsoil P1? 3) I started using syn. oil(Pennzoil 10-30) for the first time at 80,000 miles. After 1000 miles, the oil consumption is zero, but the colour seems a little darker than when i used regular oil. is it because syn. oil cleans more than regular oil? Will be grateful for all your comments/answers. Thanks a lot. -Nishan.