I wonder what the Californians did in the days when straight 30w was the norm in an auto? Here where I live, southern Cal temps are like wintertime. Yet most everyone I talk to use a "XXw-30" without any problems, and yes, on SBC's, SBSC's, and Fords too. And as you may or may not know, most older vehicles here ( the ones NOT sitting in the yard), either have the origianl motor with xxw-30 and a kazillion miles on them or have rebuilt it into the rusted heaps that were in the yard. The origianl poster has done the responsible thing. he sent off his oil for analysis, and tried a product that has shown to almost be a 40w, and has nothing but good UOA's among a variety of engine types. And add to that, the 383 stroker is almost the same as the 400 sbc, in that both have the same stroke crank. the longevity issue usually only lies between using the '400' rods and modified pistons or using the '350' rods. If the 'design' is wrong, NO oil no matter what the weight will make a difference. There may be 'educated guesses', or not-so-informed guesses, and maybe even some BS, but there is alot of good here too, in both facts from MSDS, testing and so forth, and UOA's, which Do have at least some factual basis to them.
Ward, Don't you think you were alittle hard on the Beaver?
Ward, Don't you think you were alittle hard on the Beaver?
