Greetings, new member here. I have a recently-purchased '50 Chevy with a '61 261 engine. The previous owner has been using Rotella diesel oil, T5, 10-40. I noticed that the oil pressure was around 20 when going 50 mph. Is this perilously low? Is diesel oil recommended? If no, a) dino oil, b) synthetic, or c) Valvoline VR 1? Any other tips for the care and feeding of this engine is appreciated. Thanks, Larry
Last edited by Gdads51; 11/07/2025 2:03 AM. Reason: add detail to title
