Hi there!
According to their tech dept, there are a few PENRITE oils with more that
0.1% ZZDP (1000 ppm-parts per million)
HPR and HPRD series
HPR Gas series
SIN series
Every Day Synthetic series
Every Day Driving series
Marine 4 Stroke
Small Engine Oil series
Diesel LA
Diesel GS
Multi Truck 25
There is also the CRANE additive, called Break In concentrate.
According to Crane service dept it will raise the ZDDP content of 1 gallon
of oil by 400ppm if I remember well, ie 0.04% more
Cheers!
Alex
-----Message d'origine-----
De : fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] De la
part de Enquiries Road & Track
Envoyi : mardi 1 novembre 2011 04:02
@ : fot@autox.team.net
Objet : Re: [Fot] Zinc Additive.
i have been using quite ordinary oils in my race 2500/TR6 engines for almost
30 years and never had an oil related failure, eg cam lobes worn off
in recent years i have used off-shelf Mobil 1 (not the racing version). The
current version is called 15-50. See this table to check out its zinc &
phosphorous levels.
http://www.mobiloil.com/USA-English/MotorOil/Files/Mobil_1_Product_Guide.pdf
In my engine machine shop business we have seen this occur with flat tappet
V8 engines, especially old Ford side-valve ones and more recently Chevs, but
usually owners have filled them with very modern oils.
The "tappet" problem that people refer to is not restricted to old engines.
nearly every modern engine has a tappet (now days called a cam bucket), but
most modern OHC engines have very soft cam profiles and very large diameter
tappets. none-the-less, the oil shear problems can still occur .
.Terry
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