What you don't want to do is have lots of summer diesel in your tank(s) as you travel towards colder climates in winter.
I always added a anti-gel additive on the last fill before winter. The rig started so quickly that it took too long to get oil pressure because the oil was so cold - even with the block heater.
So going into winter was the only time I used additives in the fuel.
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1978 39 FT. Newell Classic
Jeff & Leann Shackly
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