Hi Benz lovers,

Use whatever oil you're comfortable with! Why? I use Redline 10-30 (cost $6.75/Qt) and change it IAW the "book" FSS, which has been averaging 11,500mi. Cost for oil is 6.5Qt times $6.75 or $43.88. Divide $43.88 by 11500 and the result is $.003815 or the cost per mile for oil. If I changed dino at 3000 miles (I know it's not recommended for my C230, but just a calculated basis.) Oil cost $1.30 per Qt, so $1.30 times 6.5 divided by 3000 is $.002817 per mile. The difference is $.001 per mile. Gas or Diesel runs $.06 per mile or more. The increased cost of synthetic is not particularly significant. Even if you changed synthetic at 3000 mile the cost per mile is only $.0146 and that's the equivalent of $1,460.00 per 100000 mile. This is with the most expensive synthetic I know of! Wow, what a bunch of number crunching! Roger

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Roger
1983 300CD 246k sold
1998 C230 52k
1980 450SL 75k needs AC
1999 Subaru Outback Ltd 43k