[JFP in PA]

You might think the loss is all from leaks, but we know it isn’t. First of all, with these engines coolant running in the low 200’s F, the fluid is always near the upper end of its published service temp range because the pump and tank is in a very hot location, which is why a lot of people discover how quick the pumps die when you put the cars on the track for any period of time. Several aftermarket companies sell power steering fluid coolers to try and extend the pump’s life for any serious track rat. So overheated fluid is a real issue with these cars.

Second, we were curious enough to run some experiments to see if there really was leaks somewhere. First thing we did was to add a UV dye to multiple cars which were then monitored over time (the slightest leak of hydraulic fluid with UV dye lights up like Christmas). Nothing showed up. Then we took two cars that regularly had fluid level loss and rigged up a pressure testing rig that put 150 PSIG on the system and let them sit for hours. The pressure did not drop.

So I’ll ask again: If it isn’t evaporating, where is it going?