Francis, best thing I found for regular maintenance is the Redline Diesel Fuel Catalyst. Start off by adding 1 whole bottle to your fillup and then after that add a little everytime you fillup. It keeps the injectors lubricated and also reduces noise and smoke from the exhaust.

Give it a try.


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FrankieZ
84 500SEL EURO 87K
85 300D 267K (and still goin' strong)