Getting ready to wrap up the last of the smalls for the nailhead. Wondering what you guys are suggesting for oil for break in and then normal runtime, and what are a good plug brand and gap size with a pertronix 2 ignition and coil. Thanks
I recommend using any of the actual break in oils sold now. We often use Comp Cams break in oil, but have had good luck with others as well. If not, make sure to use a name brand oil and a zinc additive. Usually the cam companies have recommendations as well. Ask the machine shop what they recommend you use for oil. Many old timers believe that an engine machined to old/loose tolerances should run heavier straight weight oil. Yet others recommend the more modern multiviscosity oils. Personally I run straight 40wt in my 401. But a zinc additive at every oil change is a real good idea. I have had good luck with Delco plugs and also Autolite plugs. Not so happy with champions in the Buick.Gaps can be funny, but typically around .035" is a good starting point.
Put in the stock heat range etc plugs that is called for in your motor, AC 44S. With the PerTronix Ignitor II, run the gap at .035" - .040" and it will be happy. Don from PerTronix.
I've been running straight 30 wt. for the last couple years in the 425 in my 57. Mostly Valvoline Racing with about 1/2 of a ZDDP additive for good measure. I broke the engine in about 5 years ago on LE (Lubrication Engineers) oil and used it every oil change for a few years.
You better check that rating, you just may be fooling yourself. It's not all high zinc. And the additives for diesel vs. gas are totally different.
True about the Rotella. They have started taking the zinc out of even the diesel blend stuff. I think for the same reasons-it hurts the cat convertors, now used on new diesels.
Very few oils with zinc these days. I think Royal Purple still has it but you had better double check. Lots of discussions on the web about the demise of good oils.
Keep in mind that while a lot of the zinc has been removed, other additives have been added to take it's place and do the same job.
I have had the best luck with OEM brand plugs. In a Buick this would be AC. If you want something better than OEM, Bosch platinum are good long lasting plugs. They will probably last as long as you own it and longer.
Not to get off subject or hijack this thread, but I dont think that is necessarily correct. Most pushrod engines have gone to roller lifters which means the cams dont need the zinc to reduce wear. They have put in all sorts of other agents and detergents, but nearly all cam companies recommed break in specific oil or a zinc additive.
This is patently false. The new oil is not formulated for flat tappet cams, period. Where do people come up with this stuff?
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