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Old 09-06-2016, 06:21 PM   #23
Lepke
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City: Between Oregon and Alaska
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 3,023
Most of the time, nothing special needs to be done. Especially if you keep your tanks full and have a good primary filter. If you don't have a vacuum gauge between the primary and lift pump, add one. It will warn you about the filter becoming full.
There are two basic fuel conditioners. One causes water to be absorbed into the diesel to be burned. The other helps extract the water so your primary can separate it out. Some also make the fuel burn better helping cold weather starts and economy. Water can damage fuel and engine components because it rapidly expands (16x or more) as it turns to steam.
I use an Archoil product that costs about 8¢/gallon in the smallest size but gives me a 10%+ mileage boost in Detroit mains at 1800 rpm.
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