Goodaye all
Use the right oil for the right Job.
l use Penrite in all the cars as it has the highest zinc levels and all my engines are designed for it.
Diesel oils are high detergent and keep the engine internals clean.
Use on a new engine maybe, but not on a old engine as it cleans all the seal and it will start leaking badley.
l have used diesel oil for a month to clean the internals a bit before a tear down.
The Sloper uses HPR 50 (1940) the engine needs to gunk up a bit to stop the oil leaks.
57 wagon 283 Chev new motor HPR 30 used the Crow cam lube in it for the first month as well.
Magnum older high kms motor HPR 50 all good.
Grp3 HPR40, used Mobil synthetic with new motor for 5 years until it started leaking, now using HPR30 stopped leaking.
HG Prem original untouched motor HPR50, no smoke or rattles.
In the 80's most of the oil manufacturers lowered there zinc level as it was not good for Catalytic converters.
Problems then arose with push rod engines with cam lobes wearing in very short time.
The zinc provided better break in lubrication.
This is when it became the norm to break in a cam on a new motor, no one back then was told why it suddenly needed to be done.
So were back to the beginning right oil for the job.
In a red six l would use a older style oil with a high zinc content but the latest Holden/Chev offerings a synthetic.
Diesel engine, diesel oil.
Would also like to know if your engine builder would honor a warrenty claim for diesel oil in a petrol engine, l bet the component manufactures would'nt.
Tip just before a oil change add 1 cup of kero into the oil of a warm engine and run for 15mins, cleans out the gunk before putting fresh oil in.
(very old school)
regards Bruce
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