Make a call to your local o'reily's, kragen, pepboys, walmart, autozone and they will have it. Just make a drive down there buy it and put 1/3 in the gas tank, 1/3 in with the oil to get down to the crankcase, and then put the last 3rd of it through the mastercylinder line. Turn the truck off let it sit for 5 mins then turn it on and let her rip let it run till all the smoke is gone. Then drive it home and get it up to some high rpms like 3-4k which will help circulate it better.
Looking for another Ranger for the GF
2006 Mazdaspeed6 aka: SLVRBLT Daily Driver
2004 Ford Ranger aka: URBNRNR SOLD