I cannot get Penrite easily in Atlanta. I use Valvoline 20W50 full
synthetic. So far, so good. The car does not leak any more than it did in
the past, and I got a steady gain of about 2 psi oil pressure at both idle
and highway rpm. I also saw a jump from 29 mpg to 34 - no kidding. I keep
very close records on fuel consumption. The idle rpm also jumped up about
250 rpm after switching from mineral-based oil to full synthetic. Other
than the cost (about US$4/qt), I'd say it's a no-brainer. I may change to
Castrol Syntec as it may be more available in the near future.
On 5/22/99, Andy Webster wrote:
>I have been a devout PENRITE user (HPR50) since I forked out $2100 to
>rebuild a 318-V8 a few years back and have always used it in my sprite. The
>only concern I have with it is its 'starting' ability.
>As a 40w-70 oil I would expect that its going to be pretty slow in getting
>to the top of the motor. Is this not a problem because it tends to cling and
>it will already be there when I start up?
>I know some people are using mobil 1 synthetic in their spridgets...any
>opinions on it? I thought it was really for modern multivalve cars with
>ultra tight tolerances etc. I'm attracted to the 5w, runny when cold side
>that suggests that it will be at the top of the engine in no time. What kind
>of pressure does it maintain when its that light and at temp? Can you folks
>outside of Australia get Penrite?
>Thanks in advance
Jeffrey H. Boatright, PhD
Senior Editor, Molecular Vision
"Seeing the Future in a Very Tiny Way"