Quote:
Originally Posted by ront49
I'll open up a can of worms that has been hashed and rehashed many times ... Q. What oil is recommended for a 351W stroked to 418, roller rockers, cam, 750 Holley ..... |
If you don't have solid lifters, then the ZDDP content is not nearly as critical as if you do. That said, an old fashioned "healthy" ZDDP content is not going to hurt anything so long as you don't have a catalytic converter or other sensitive emissions equipment (which almost none of us have in these cars). That leaves you two basic choices, dyno versus
synthetic, and what viscosity should you use. You will get varying opinions on both but, at least on FE engines,
synthetic oil seems to "leak" a bit easier than regular
oil does. Maybe that's just an old wives' tale. The best answer as to viscosity is whatever the engine builder recommends. If you're curious as to what I use, and I almost never even start the car up unless it's in the upper 50's at the very least, it's Brad Penn 15w-40 and it's a "partially
synthetic" oil. I guess that's kind of like being "partially pregnant."
