OK, I've Googled Diesel Bug and indeed found only information with regards to marine diesels (like I assumed from sto6enc's reply).
I've read a test of 10 of these products and Marine 16 Diesel Bug Treatment came out best (test is here: http://www.marine16.co.uk/acatalog/d..._pbo_test1.pdf )
According to test: Not only kills it the bug but also breaks the bug up in order for the dead remains to pass through the filter.
I have now two questions:
1. in marine they talk a lot about 8 micron filters, in passengar cars I believe the standard is 2 micron, so much more intens filtration. Will it do the job? (I understand that all (or almost all) replies to this question will be without guarantee, but the more opinions the better.)
2. Is this product (based on Biocides) safe for a passengar car diesel engine? (same remark as with question 1)
I'll also ask my dealer tomorrow when I find the time, meanwhile would appreciate every feedback on above questions.
Again: thank you in advance,
brgds,
Dirk