With synthetic oil is it necessary to add ZDDP? I'm guessing not, but I'll wait for a more informed response.
I would think it depends on which brand synthetic brand you would be using and the zinc count within it already. Did you have a certian brand in mind? I run Rotella in the all stock Nailhead with no additives.
Yards, Yes, you will need zinc with synthetics. But, save yourself some money and go to Autozone or any of the other parts stores and pick up some STP oil treatment (motor honey, blue bottle) and add 1 at each oil change. Its loaded with ZDDP for a fraction of the cost. Make sure the engine is running and warmed up before adding it since its as thick as honey. A funnell will help, trust me.
That's what I am going to use. My engine builder uses nothing else. I mentioned to him all this talk about Brad Penn not having enough zinc and he said he has heard nothing about that and will continue to use it on all his engines because it has worked great and still does. There's just something fishy about why ZDDP is so expensive but STP would have just as much in their formula for a fraction of the price. I don't get it, why can they afford to sell it cheap but the ZDDPlus is so expensive still?
Volume. ZDDPlus is only used by some muscle car guys and maybe a few Harley riders. V.S. A ton of marketing via STP to people who have no idea. I'd be curious to see the MSDS sheet on the STP.
Most popular brands of oil have only 600 ppm or so of ZDDP, and far too much detergent to allow extra ZDDP to bond even if you add a bottle full strength. Brad Penn has 1600 ppm AND LESS DETERGENT, which is a very good thing. You may get by without extra zink if you have weak valve springs, but to add a bigger cam and strong valve springs without it is VERY risky. One other benefit of high sink content is the fact that many of us let our cars sit for a few months through the winter and ZDDP (zink) sticks with the bearings, cam lobes and lifters for the next start up in the spring. Do some internet searches for ZDDP and read up on it . Also ask some of the race turbo v6 guys about Zink and get an earfull of disaster stories, and learn about the removal of zink in the past few years. Or search ZINK on this site for more sad tales. Better yet, ask the big racing cam manufacturers to guarantee your new racing cam WITHOUT ZINK ADDED. HERE'S ANOTHER GOOD ONE: Ask JW or any other Race engine builder to skip the extra zink addative on your next new 500 HP+ engine he builds for you. Raise your ZINK AWARENESS, then help spread the news.
ONE MORE THING. Don't rely on popular additives as to their zink content until you KNOW how much it has. A little (barely legal), is not enough. Over the counter additives that damage catalytic converters would be illegal or big lawsuits watiing to happen. You want the real thing that new cars CANNOT use. LESS DETERGENT, LOTS OF ZINK (1600 PPM) MAKE A HAPPY VINTAGE MUSCLE CAR ENGINE.
amsoil premium has enough for a stock/mild engine build...but youre limited toi 20-50 or 10w-40 amsoil dominator series has enough for any application but you can always just use anybrand and a bottle of zddp
Yards, I'm sorry your thread got trashed. I put about ten hours of hard driving last summer on the new cam & heads with conventional oil and ZDDPlus, that includes two oil changes due to break-in. All is well with the big solid lifter cam. Now it's time for me to go back to Mobil 1 synthetic this year with ZDDPlus. The synthetic oils have great high pressure additives, but the zinc/phos has been reduced in the off the shelf stuff. I will run synthetic with the additive. My answer is YES, an off the shelf synthetic oil should be supplemented by a zinc/phos additive unless there is documentation to show otherwise. Devon
http://www.v8buick.com/attachment.php?attachmentid=156348&d=1261419960 this is probalby the best in packaged oil the best would be zdpp ZDDPlus contains the needed 18% zinc and 15% phosphorus to keep youre classic engine in good running order for years to come!
Got this from the royal purple website: Do your motor oils contain zinc and phosphorous? Yes. All Royal Purple engine oils contain the zinc/phosphorous compound zinc dialkyl dithiophosphate (ZDDP) and are suitable for both roller and flat tappet valve trains Can your oil be used with flat tappet cams? Yes. For stock or mildly modified flat tappet valve trains (<.525 lift), we recommend our SAE 10W40, 15W40 or 20W50 engine oils. In applications with flat tappet valve trains using high-lift cams and/or high RPM applications, we strongly recommend upgrading to our XPR line of engine oils as these have an even greater concentration of ZDDP providing excellent protection with the higher spring pressures. For a viscosity recommendation, contact our Tech Dept. at 888-382-6300. They also say not to use an additive with there oilo No: I use 10w-30 in my car I also recently wiped some cam lobes and I never used an additive so hey maybe there wrong:laugh:
i use castrol gtx 10w40 + ZDDplus at each oil change - twice per year. i have been doing that for 5 years now.
My engine builder says use Brad Penn only in my race motor, that is what i do, NOTHING ELSE. Also read this below !!! http://www.hughesengines.com/Upload/productInstructions/CamshaftLubricationFacts.pdf
Scott 79, YOU NAILED IT BUDDY!!!!!!! EVERYONE NEEDS TO COPY THE WEBSITE INFO ABOVE AND SHARE IT. LETS ALL PUT A COPY ON OUR SHOP WALLS TOO. Low detergent (a must) High zink (1200 min)
