Quote:
Originally Posted by spdbrake
My 408W runs at 40psi @idle once up to temp and being driven a bit. You should be fine. I used to see 70 on cold start up before I added a thermostat to the oil cooler. Now is a around 60psi. The Thermostat I use has a 10% bypass so the oil cooler oil slowly gets up to temp and you don't dump a slug of cold oil into the engine once the Thermo opens. I run VR-1 10-30 oil.
The Ford Racing 392 installation notes to use a synthetic or reg 20-50W oil. Since its a roller lifter motor you don't need the Zinc additive.
https://performanceparts.ford.com/do...7-A392D392.pdf |
Agreed. Straight out of the linked document:
INSTALLATION INSTRUCTIONS:
Engine Prep:
2. The engine has been hot tested. The 20W50 factory fill oil should be changed after the break-in cycle. Any good quality natural or synthetic 20W50 oil may be used.
I'd skip the
zinc additive and run a good
synthetic 20W50, per instructions. That will raise cold and hot pressures, and may also reduce engine temperatures. I know my engine runs a bit cooler on synthetic oil than it does on dino, presumably due to reduced internal friction.
P.S. If it were my engine I might even consider 10W50 synthetic.