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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt'>I am puzzled about the proper oil viscosity for my Rover 3.5 V8 engine. Des Hammill's book <i>How to Power Tune RV8 Engines </i>states “Anyone used to oil pressures hovering around 70 – 75 psi on an MGB 1800 engine will be alarmed to see pressures in the Rover V8 reading 15 – 40 psi. These engines are low-pressure engines with normal pressures (hot) at 20 psi idle using a 15W 50 oil, and 40 psi over about 3500 rpm.” Its time for me to change the oil in mine and 15W 50 seems a bit high when compared to oil normally used in my other US built cars. Anyone have any thoughts or suggestions to this?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'>Thanks in advance for your input.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'>Jim Ray<o:p></o:p></span></p></div></body></html>