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We live in Southern California and it's hot here. We don't live in the cool ocean breezes part of SoCal, we live in the Mojave Desert adjacent part of SoCal. From July 4th until Halloween, it's hot every day. Yep, in September and October when the leaves are turning elsewhere in the country, we're still baking. We know it's December because that's when our leaves finally turn color and the land gets ready for our two month long winter.
So when we hear about a product that claims it can reduce wear on your A/C compressor and make your system last longer while also producing cooler conditioned air in the cabin, we had to check into it more. And when our research led to tests done by the US military showing that using the Militec additive really did make A/C compressors run cooler and last longer, we really got interested. Then when we read a summary of a test done by a custom air conditioner manufacturer using Militec-AC in a 13,500 Btu/hour unit where the compressor case temps dropped from 230F degrees to 194F (36 degrees cooler). But more than that, they then emptied the refrigerant from the system and ran it dry, expecting the normal overheat and lock up within minutes. According to the summary the system continued to run for two hours without ever exceeding its rated maximum compressor temperature.
So we ordered up a kit to try out on our new project RAM 3500 truck. The truck has only 3,500 miles on it, but we figured if we could measure an improvement on a brand new A/C system, we could extrapolate the results to older ones.
The system consists of an adaptor to mate the Militec additive container, called a "puck," with the low pressure service port on your vehicle's A/C system. The puck fits into a screw device which is used to squeeze a piston within the puck and insert the additive once connected through the appropriate port.
We took our truck on a 40 minute drive with the A/C system on maximum cool to ensure that the system was fully up to temperature and the cabin was thoroughly cooled. The outside ambient temperature was 92F degrees. We pulled into the driveway and used a quality laser temperature probe to get a reading inside a central A/C vent in the cabin and then crawled under the truck to get a reading on the compressor case. The results were 46.7F degrees inside the vent and A/C compressor case temperature of 168.3 degrees.