I just bought a 124 with the gas engine ( I6 3.0) and was wondering what would be a really good oil to use. The owners manual is from 1988 and leans toward the thicker oils of that era. As we all know here on this site oil has improved since then. The car has 235,000 miles on it. It was a 2 owner car that was very well maintained. It was just 1500.00 dollars. Thank You in advance! Bill