I'm actually using this additive right now too, and so far I have no evidence of clogging. I suppose my fuel tanks were pretty clean to begin with. I only used the recommended dosage, i.e. 1 oz/16 gallons of fuel.

I think the limit on the pictures is what 300DPETE is saying, plus there's a memory limit of 65 KB per picture if I remember correctly. If you don't have any of the photo editing programs mentioned above, you most likely have Paint. Just open the picture in Paint, go to the Image menu and select Stretch/Skew and type in a smaller percentage. You may have to do some trial and error to bring it under 65 KB.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL