I've been using the DFC since I had my 300D and it wasn't until I ran out of it that I noticed the difference in the smoke out the tailpipe. Since I haven't been able to get ahold of DFC I was apprehensive about trying some brand unfamiliar to me. Today while warming up my car, I looked out the front door at it and I noticed quite an increase in smoke.

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Frank
84 500SEL EURO 101K ( JUST LIKE MY 1ST WIFE. GLAD TO GET RID OF HER! )
85 300D 310K (sold)
90 350SDL 184K sold
83 300D 118K (sold)
88 300E 153k (sold)
93 400E 105K (sold)