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Marc Haibeck · 07-26-2011

I think that the Mobil 1 High Mileage would be a good choice. Although the LT5 has flat lifters, it has a light load on them compared to flat tappet two valve engines.

Brett. Be careful about the SM and SN designations. Those designations specify .08% / 800 ppm maximum. Some products like Mobil 1 10W-30 have less. Refer to the Mobil 1 chart in this thread. The bottom line is to check the zinc and phosphorus levels for the product that you are planning to use.

07-26-2011	#16
Marc Haibeck Join Date: May 2007 Location: Addison IL Posts: 252	Re: Rizlone ZDDP additive I think that the Mobil 1 High Mileage would be a good choice. Although the LT5 has flat lifters, it has a light load on them compared to flat tappet two valve engines. Brett. Be careful about the SM and SN designations. Those designations specify .08% / 800 ppm maximum. Some products like Mobil 1 10W-30 have less. Refer to the Mobil 1 chart in this thread. The bottom line is to check the zinc and phosphorus levels for the product that you are planning to use.