This guide is for owners of the 1981–1985 Datsun and Nissan 720 4x4 pickups who need to change the clutch or make transmission repairs. This information is shared freely; comments are welcome!
Repair manuals for the Datsun/Nissan 720 series of trucks fail to mention the fuel pump relay—where to find it, what it does, how it's wired-in, and how to repair or replace it. Luckily for you, this article has the answers.
Viscosity makes the difference. Your oil is marked with a "cold" and "hot" viscosity.