The Ford Barn

40cpe · 01-27-2016, 12:01 PM

I'm getting closer to starting my rebuilt engine. It seems to be agreed that adding ZDDP to the oil would be beneficial to the cam and lifters. I also read that too much ZDDP is worse than not enough. Looking for a product to use, I found that Redline 81403 Additive with ZDDP tells how much ZDDP is added the the oil. I plan to use Rotella 10W-30 diesel oil for start-up. The best I can tell it has about 1000 ppm ZDDP. If I knew what the recommended concentration for break-in is, I could get pretty close by adding the correct amount of Redline. Is there an established ppm of ZDDP that I should shoot for?

01-27-2016, 12:01 PM	#1
40cpe Senior Member Join Date: May 2010 Location: Star, MS Posts: 4,120	How much ZDDP for break-in? I'm getting closer to starting my rebuilt engine. It seems to be agreed that adding ZDDP to the oil would be beneficial to the cam and lifters. I also read that too much ZDDP is worse than not enough. Looking for a product to use, I found that Redline 81403 Additive with ZDDP tells how much ZDDP is added the the oil. I plan to use Rotella 10W-30 diesel oil for start-up. The best I can tell it has about 1000 ppm ZDDP. If I knew what the recommended concentration for break-in is, I could get pretty close by adding the correct amount of Redline. Is there an established ppm of ZDDP that I should shoot for?