Post-Lube Moves There are several different types of engine oils, including several diesel oils, that contain higher levels of zinc and offer better protection for flat-tappet lifters and cam lobes. The choice will come down to price and performance, with the diesel and racing oils being the best choice in terms of cost versus performance.There are several different types of engine oils, including several diesel oils, that cont OK, you've followed all the rules and your camshaft is now broken in and makes lots of power and all is right with the world. But your job isn't over yet. First, put about 50 miles on the engine and then drain the oil and swap filters. This will get rid of the majority of the metal that ended up in the oil during break-in. If you really want to protect your flat-tappet-cammed engine, that standard API SM spec oil is not going to do the job as well as it should, since it lacks that double shot of antiwear zinc phosphate (ZDDP). While some overzealous enthusiasts are dumping a can of GM EOS in with every oil change, there is a better solution. You may have heard several of the higher-quality diesel engine oils contain higher levels of zinc phosphate. We've listed several different brands that should be easy to find at your local auto parts store because of the increasing popularity of diesels pickups. Among these are racing oils such as Quaker State's Q Racing that offers higher levels of ZDDP as well as many other high-performance additives. If you have a question about an oil, look for an API SJ or SM rating. If the oil has either of these ratings, it probably does not offer higher levels of ZDDP. Racing oil is generally not API rated, since the oil is not intended for daily use in production engines. But for high-performance street engines, racing oils offer advantages as long as you treat the engine to frequent drain intervals. Engine Oils Containing Higher Levels of Zinc Phosphate BRAND WEIGHT Castrol Tection Extra 15W-40 Chevron Delo 400 15W-40 Mobil Delvac 1300 15W-40 Shell Rotella T 15W-40 Quaker State Q Racing 0W-5, 15W-50, and 17.5W-35 Joe Gibbs Racing MicroZol 0W-20, 10W-30 Zinc Levels in Motor OilThe following levels give you an idea of how zinc concentrations have changed over the past three years. The new for 2007 CJ-4 diesel designation will reduce zinc levels even further. YEAR OIL DESIGNATION (API) ZINC CONCENTRATION (parts per million-ppm) 1996 SH 1,300 2001 SJ 1,100 2005 SM 870 2006 Shell Rotella-T (diesel) 1,400 2006 Q Racing 1,960 2006 Joe Gibbs Racing XP-4 2,800 Parts List DESCRIPTION PN SOURCE PRICE GM EOS, 16 oz. 1052367 Scoggin-Dickey $4.95 GM oil additive, 4 oz. 12345501 Scoggin-Dickey 7.39 Comp, Pro Cam Lube, 4 oz. 152 Summit Racing 6.99 Comp, Break-in Lube, 12 oz. 159 Summit Racing 15.39 Crane Super Lube, 8 oz. 99003-1 Summit Racing 8.50 Q-Racing 17.5W-35, 1 qt. --- Internet 13.30 Shell Rotella-T, 1 qt. --- Amazon.com 2.89 SOURCES Crane Cams Daytona Beach FL Comp Cams 8-00/-999-0853 www.compcams.com Joe Gibbs Racing Oil Scoggin-Dickey Parts Center Lubbock TX Valvoline Lexington KY www.valvoline.com Shell Oil (Quaker State, Pennzoil) « | 1 | 2 | 3 | 4 | View Full Article Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!