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Visibilities · 11-20-2017, 11:21 PM

Call me stupid for asking this, the oil weight GM specifies to load into the 6.2 L99/LS3 is 5W-30. I've gone by this standard ever since I got my Camaro. I've been seeing AMSOIL advertisements about putting much higher weight oil into racing (built, blown, stroked, bored etc.) engines. My L99 block is converted to an LS3 (LS7 lifters, new trays, new chain, etc.) and is cammed with a Procharger as well. Would it be alright, and maybe even wise to run a heavier oil such as 10W-30, which is the lowest weight AMSOIL Dominator Oil (which is the one I'm leaning towards) comes in. If so, would anyone recommend a certain weight for this application? My engine spins out to nearly 7,000rpm at WOT and hearing about what the wrong oil does makes me kinda squeamish. Thanks - Vis.

11-20-2017, 11:21 PM	#1
Visibilities Drives: 2014 SS - Sleeved 427/Procharged Join Date: Mar 2017 Location: Central Oklahoma Posts: 109	Engine Oil Call me stupid for asking this, the oil weight GM specifies to load into the 6.2 L99/LS3 is 5W-30. I've gone by this standard ever since I got my Camaro. I've been seeing AMSOIL advertisements about putting much higher weight oil into racing (built, blown, stroked, bored etc.) engines. My L99 block is converted to an LS3 (LS7 lifters, new trays, new chain, etc.) and is cammed with a Procharger as well. Would it be alright, and maybe even wise to run a heavier oil such as 10W-30, which is the lowest weight AMSOIL Dominator Oil (which is the one I'm leaning towards) comes in. If so, would anyone recommend a certain weight for this application? My engine spins out to nearly 7,000rpm at WOT and hearing about what the wrong oil does makes me kinda squeamish. Thanks - Vis.