steve remick Posted May 13, 2021 Report Share Posted May 13, 2021 I completely remanufactured the engine (289 R1). Pistons 10,000 over size. Hardened valves, valve springs. All engine bearings replaced and all internal parts such as pistons, rods ported and polished. I'm using Vavoline Racing Oil VR1 SAE 20W-50. My question. Do I need to add a lead substitute (CD-2) on gas fuel up? Thanks to all in advance for your comments! Link to comment Share on other sites More sharing options...
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