Yes there is and it is at the front LHS of the engine where the low oil pressure warning light sender is located. However why have an auxiliary gauge when the normal one can be made to work correctly. I found that by using a manual gauge in the sender position, I could compare the dash instrument with the manual one and was able to find that the dash instrument sender was faulty and so I replaced it . Now the two are within a coupe of pounds of each other. Nice result!