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  1. M

    Oil Pressure Fluxuates--Should I Change Viscosity?

    Trav, Cold the bar is pegged and never moves. Only after being thoroughly warmed up does it drop to 1.5 or 2 bars at idle. My concern is that this never used to occur with the car. I've only owned it for a month though. I assume it had a summer oil in it prior--probably 20w-50 after...
  2. M

    Oil Pressure Fluxuates--Should I Change Viscosity?

    Rollins, Thank you. This is very helpful. My manual has a similar chart that just shows SAE 30 for temps above freezing. And it sounds like Redline's 30s are on the thick side. Maybe I'll see how it does over the winter and move it up to 40s in spring. Yesterday was probably the last warm...
  3. M

    Oil Pressure Fluxuates--Should I Change Viscosity?

    At least 45psi at high revs, that's where the gauge tops off. Thanks for your reply!
  4. M

    Oil Pressure Fluxuates--Should I Change Viscosity?

    Hi Everyone, Thanks for these great responses. You guys put my worries at ease, for the most part. I suspect the previous oil was a higher viscosity; the oil pressure gauge never left the 45psi mark until I changed it to 10w30. I swapped the oil filter, so I don't think I have any...
  5. M

    Oil Pressure Fluxuates--Should I Change Viscosity?

    Hi All, I know this topic has been addressed here and there, but I'd really appreciate advice specific to my situation. I have a 1970 Mercedes 220, gas, 4 cylinder, Stromberg carburetor. I recently acquired the car, and changed the oil for the winter (California Bay Area) with Redline 10w30...
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