I used the dual Racetech oil temp/pressure guage but had a problem.Where the hose connected to the sump temp sender broke,so the mercury (or whatever liquid they use) leaked out and the guage of course stopped telling me the oil temp.For this reason I switched to a electric oil temp guage,no liquid to leak,just a wire.The replacement guage was also a Racetech.Just from my experience.Regards,Micky