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Old 02-26-2020, 07:40 AM   #12
caltexflanc
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City: North Carolina for now
Join Date: Aug 2011
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Primary when cued by vacuum gauge or when I felt like it (usually the latter since I can only recall doing it per the gauge once). Typically changed secondary at same time, easy to do with fuel primer pumps and in our case very easy access to the spin-on secondary.

Detroit 8v92TI. Added pressure gauges before the secondary just because I could; they never came into play in telling me the secondary needed changing. Primaries were 30 micron, secondaries Detroit branded, 7 micron IIRC, both per Detroit rec. Always managed refueling around high volume fuel docks or straight from the truck. No additives unless they had already been mixed in by the fuel dock, like ValveTec.
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