There's about 1,000 opinions in this chapter, just use the search function of the forum to find them. there's some going on right now in the Superduty chapter.

 

Well, I'll bite: General opinion is to replace both batteries at the same time with two of the same type and strength - a stronger battery paired with a weaker one will have the strong one always "charging" the weaker one, which weakens it. For the 6.0, the stronger the better... I'm not a fan of Optimas at all - there are better batteries out there for your truck. If you stick with the Motorcrafts buy TWO... And make sure your charging system is up to the task as well. IMO a 140A alt is minimum for our engine...

Scott

 

 

Just my .02 I would buy a pair of either the Odyssey 65-PC1750T or the Northstar NSB-AGM65 batteries. Good luck, Russ

 

I just bought 2 from advanced online and saved 25% on each by placing 2 orders ( save code it will work again) plus had a couple save $20 coupons it worked out to be like b1g1f so far so good. Only been a few weeks and like most batteries now 3 year free replacement

 

Optimas are garbage, they were better before production got moved to Mexico. Interstate owns Optima iirc, see if he can hook you up with Interstate batts. Good luck.