Has anyone added a second battery for added reserve to aid in cold weather starts? The past week we have had some -15F nights here in WI and it's all my new NAPA 850CCA battery can do to crank the engine fast and long enough to fire up. I'd like to see pics of the second battery tray mounting if anyone has done this. I'm also running 5W-40 semi-synthetic oil.

My F250 powerstroke has two batteries and has yet to leave me stranded.

Thanks.

John

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Certified Registered Nurse Anesthetist (CRNA)
2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI