After reading this thread I tried this stuff in 2 of my cars and I even used 2-3 times the recommended dosage but it made zero difference in engine noise or anything else. Maybe it makes a difference if you use crappy fuel, but I suppose the B5 fuel that I use is already pretty good.

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2004 VW Jetta TDI (manual)

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

I thought I'd play, dumped in a small bottle on 3/4 tank of fuel.
Not sure if it's quieter, no unusual smoke, and as of after my 25 mile drive home tonight, my 1500-1800 noisy injector is quiet. Hmph...
Diesels are such funny motors sometimes..

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One more Radar Lover gone...
1982 VW Caddy diesel 406K 1.9L AAZ
1994 E320 195K

A bottle of SVO mixed at the same ratio, ok ok maybe... little more SVO in the ratio, I'm sure will serve you just as well. Sir Rudolph Diesel will smile in his grave if ya do this.

(SVO= Straight Vegetable Oil, Grocers shelf kind

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"Know other lessons I need to learn? TELL me. Tired of learning'em the hard way".

Glow Plug Wait: [i} Time of silence in homage Rudolph Diesel. Longer you own a diesel. more honor you give". [/i]

Life; SNAFU Situation Normal All Fouled Up, & FUBAR: Fouled Up Beyond All Repair

-Now: Snafued Jeep TJ w/OM617 2Be daily driver & building SS M1079 w/Ambo boxed /live in Adv. Truck, Diesel KLR conversion
-Sold 62 UNIMOG Camper w/617 Turbo, 85 300SD

why is is blue? ours is kind of clear.

The color of fuel + filter + flashlight = light blue