Join Date: Jun 2008
Location: Clifton, IL
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MOTOR OIL WARNING!!
Important message regarding "break in" protection for all high performance flat tappet and solid lifter camshafts.
........government regulators have mandated as of Jan 04 the complete elimination of the critical anti-wear additive package (zinc/phosphorus) from all "SM" rated (street legal) motor oils to protect catalytic converters.
Isky recommends the use of only the following oils for maximum cam lobe and lifter protection before and after the break in period because they are the only conventional mineral based oils available with generous levels of the zinc/phosphorus additive package.
Brad Penn Penn-Grade 1 ** The very best in our opinion and the only oil refined from 100% PA crude.
Pennzoil "GTP" Racing Oil (Excellent. Do not confuse with regular grade of Pennzoil)
Valvoline Racing Oil (Excellent. Do not confuse with regular grades of Valvoline or Valvoline VR-1)
If you do not use one of the above oils, the next best approach is to supplement other common mineral based oils with EOS (Engine Oil Supplement) available from any GM dealership. .................
Special Note Regarding Synthetic Oils
Please note, Isky does not recommend the use of synthetic oils with any flat tappet camshaft especially during break in. If you must use synthteic oil after break in, there are only two brands we are comfortable recommending. They are Amzoil [sic] (Red) racing Oil and Joe Gibbs Performance Racing Oil. Both contain zinc and phosphorus and will fare well AFTER break in has been successfully completed. Other synthetics, especially those with very low viscosity index numbers (i.e. 0W-15, 5W-20, etc) have very low film strength and are not designed for, nor should they be employed in any flat tappet cam installation.
.....................remember to immediately rev to 2500 RPM and keep it there for the first 15-20 minutes of operation...................