I keep hearing that there is so many additives that you can't catch, but yet have not seen a name of one that if enough is used to give any power gain that the Digatron DT 64 fuel tester won't catch if its used as a comparison tester. In other words set a range on the DT64 fuel tester that all karters fuel must fall within on DC1 readings and also look at the DC2 reading and see what the fuel reads on that window, anything other than a plus or minus 3 counts off zero will tell you that their is an additive not normally found in the fuel being tested, I realize that if you go only by DC1 tests on the Digatron fuel testers that karters can get within your range set by mixing additives that will either raise or lower the readings, but regardless of what they used to get within those ranges it will effect the DC2 readings if its anything other than Gasoline or methanol/alky. This is if you calibrate the Digatron fuel tester with the known agents we recommend.
We sell more units over seas than locally, why, because they know how to use the instrument. $700 is really not that much for the quality and ease of use of the Digatron Dt64 fuel tester, not every karter has to have one and its fast to test with.
For those who keep saying there are additives that the unit won't catch, go borrow a new unit and perform your tests after calibrating the unit like its suppose to be done and then compare readings with a fuel without your additives and with the additives and pay real close attention to the DC2 readings. We also have a better temp sensitive compensating circuit to compensate for temp changes and keep readings more stable.