I run Optima group 31 batteries in my 300SD and Escort diesel. No rust, lways start, plus years life! At the Fire Derpartment where I am the Fleet Supervisor we only use Optimas in everything. They are part of Interstate Batteries, by the way. A great company.

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Retired
ASE Master Car / Light Truck
ASE Master Medium Heavy Truck
EVT Master Technician Ambulance
EVT Master Technician Fire Apparatus

"Without Fleet The Pride Doesn't Ride"

1983 300SD 609K + still going strong!
1970 Monte Carlo
1994 Ford F150