I usually run acl race bearings in all my builds with 20w-50 valvoline race oil. Over the race weekend on Saturday my oil pressure dropped to 5-10psi hot, 40psi 4K and 70psi up to 8k. Pulled the main and rod bearings. They showed some overheating wear. Autozone had clevite oem replacement bearings. I threw those in there and was back up and running Sunday morning. Now my pressure is 35-40psi hot at idle and 90+ At all other rpm. Question is what other oil viscosities do you guys run on your turbo engines? I've never ran anything but 20w50 and race bearings. I am worried about how thinner oil will hold up under the stress and oil temps In the 240-280 deg range.