m5040 Posted October 13, 2012 Share Posted October 13, 2012 I have a EM6 300 with over 500k on it that I know of. When I lug it down to 1100 rpms, the oil pressue is maybe 30psi. Has anyone used straight weight oil (like 30w) in their engines? I live in CT but don't use it after November. The straight weight oils really keep the 2cycle Detroits together. Quote Link to comment https://www.bigmacktrucks.com/topic/27786-high-mileage-engine-oil-recomendations/ Share on other sites More sharing options...
oilburner Posted October 14, 2012 Share Posted October 14, 2012 I have a EM6 300 with over 500k on it that I know of. When I lug it down to 1100 rpms, the oil pressue is maybe 30psi. Has anyone used straight weight oil (like 30w) in their engines? I live in CT but don't use it after November. The straight weight oils really keep the 2cycle Detroits together.I have a e 7 454 that only has 12 15 psi at 600 rpm hot, and maybe 30 at 1100, i would run 15w40 and put some lucas in with it. Quote Link to comment https://www.bigmacktrucks.com/topic/27786-high-mileage-engine-oil-recomendations/#findComment-141582 Share on other sites More sharing options...
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