"theoretically, if you have the cluster plugged in, the key on but the engine off, the tach should want to point to zero rpm. so that is the time i would put the needle back on"
I believe 10w30 is the recommended oil. If your engine has some miles on it, 10w40 might be a better choice. I had to run 20w50 to get any more than 10psi of oil when the engine was hot.
