Hi, I want to replace my oil lines cause I have a leak in them. I am going to get a hydraulic hose made to size From Napa, but I was wondering if anyone knew what the 4 adapter sizes are? I am replacing the 2 hoses from the motor to the oil cooler in a 1984 gsl se.

 

Why not remove the old lines and let NAPA match the fittings? I replaced my two oil lines ('80 12A) with stainless braided hose from Mazdatrix. They are not cheap but they fit and look great.

 

or if you want to go the trick route go with air equip lines. it looks great and will not need replacing for a very long time.

 

I bought a stainless steel oil line kit, it looks great but was expensive. I believe the brand is Earls.