I have a 350 Chevy Tbi V8 in an 88 Chevy K5 Blazer. Recently changed the oil and I've now noticed my oil pressure reads 0...! I used to have 15w40 but I put 10w30 in. I've read that lighter oils can cause bad oil pressure... Anyone know if this is a possibility??
The other option I think may be the oil pressure sender has gone bad, or something's been disconnected when I recently had a transmission rebuild.
Also has anyone got experience with the Halfords Classic Car Oil, think its 20w50.