Two part question,...this is for a 1988 none turbo RX7

I purchased a radiator cap not for the radiator itself but for the other radiator cap that sits right by the thermostat...
hope that makes sense!!!

however, does it make a difference if the new cap has a spring, but the old cap didn't...the new cap looks simular to the radiator cap....can i USE IT?

if the radiator was losing pressure...would it cause the engine to break down the oil faster?...thus causing the car to use oil?

 

I think it's called the filler neck

It'll work. Go for it!

Remember that your car has oil metering('88s have mechanical oil metering right? Press the gas down, and the oil metering increases?) How bad is your oil consumption?

 

I am putting in 1 quart every 100 miles
no smoke
no burning
no leaks,
but a few of the guy's here told me that my oil seals are going bad...but I was hoping that the car was running to hot because of the bad cap..plus causing the car to use up the oil