There are a few oils out there that have the ZDD in it. Brad Penn, Shell Rotela that many recommend to name 2. I had used Valvoline 50 weight racing oil in the past which has it in it as well when I had an oil leaking issue.Hi Folks. Getting ready to change the break in oil on a 67 but I read recently that a lot of the blends out there now have some of the addatives removed that these old engines need. Does anyone have a suggested brand? thanks for your help.
Any reason you would recommend against them? Pickings are slim north of the border for oils with higher ZDD in them (at least around here), but I was able to order Valvoline VR1 20W50 racing oil from a local parts store, which is what I used when I did the first oil change on my new goat just before spring.Stay away from the so-called "racing" oils, and the 20/50 grades....JMHO.
The oil they sell at Napa here in Novato, CA has 1400 ppm zinc andThe valvoline VR-1 that Napa and O'Reilly has in stock in California has minimal if any ZDDP in it. It is inadequate for flat tappet engines. The only VR-1 that qualifies is the stuff that says "FOR OFF ROAD USE ONLY" on the bottle, and I can't get that over the counter in California. If you're using the "off road" stuff, fine. The regular VR-1...forget it.
if it was perfectly good what did you accomplish by changing it? i run synthetic in my mercedes and change it at about 15000 miles. i change the filter every 5000.I am currently using Brad Penn 20W50 which i get at Stinson fuels in Ottawa Ontario Canada.I used to use Royal Purple 10W40 but got tired of the cost of dumping perfectly good oil down the drain after each season.The arguement of what oil to use will never end (conventional,semi-synthetic or a full synthetic).I choose to use a good oil and premium filter and change often.
Have you ever heard of John Sawruk? John was the foremost Pontiac expert. John recommended NEVER use synthetic oils in these old motors. He touched on the reasons why at seminars he gave. He didn't touch on this topic at the seminars of his I attended but others I know did and learned why not to use them.Don't get me wrong i think Synthetic oils have ther place.The engines in today,s vehicles are much more efficient than 40 year old V8's.What i meant to say is that the oil gets washed down with fuel so i really do not see how i benifit from using a synthetic oil.I can change my oil 3 times a year for the cost of one change using Royal Purple.Brad Penn has high levels of ZDDP and seams to improve my oil pressure.Believe me i change the oil in my GTO every in the spring and every 2000 miles if i drive it allot.Just my 2 cents