Re: Penrite oils for 53 clipper

Posted by HH56 On 2010/5/20 12:20:21

Packard recommended SAE 90 gearoil which Castrol UK website crosses to ST 90. The only spec Penrite mentions is viscosity and has 24.4 @ 100 degress C. The Castrol ST 90 has a viscosity of 18.6 @ 100C so on that part, Penrite would appear to be in the range of acceptable and maybe even a bit heavier which might be good for the warmer times. There does not appear to be a direct correlation with SAE numbers I could find otherwise.