yea i heard that too!!! LOL the numbers are showing it i only slowed down a mile an hour not much from 65 it seems to be working so im a believer...
believe what ya want its working for me with my set up in my Columbia with detroit 60
i bought one and it paid for itself already i ran 746 miles on 75.125 gallons running Sacramento to kingman az then i filled up with 107 gallons...
will do that i only added 40 gallons of fuel to get me home from phoenix i usually dont use the qualcomm for fuel mpg accuracy it not totally...
i left on thing out that i found out this device only works at 65mph and under so some drivers that may have had this and said it didnt work maybe...
just got the turbo 3000d two days ago saw improvement in mileage usually when i run mty i see 6.8 to 7.1 mpg depending on where im running i left...
check your oil cooler lines you could have a dry rotted line and causing leak if oil cooler is bad engine temp will be slightly higher i had a bad...
i had the same thing happen on my Columbia with the Detroit 60 it was just the fan solenoid if that doesn't work might want to try the fan clutch
