[DeTomaso] Oil Smoke From Breathers

[Dave Londry]

Sorry - forced to disagree here Jack.
For even 280# springs and a moderate ramp on flat tappets - don't leave 
home without it.
dave

On 5/18/2011 12:39 PM, JDeRyke at aol.com wrote:
> In a message dated 5/18/11 4:05:46 AM, dfcex at pacbell.net writes:
>
>> The engine and cam has about 2,500 miles now, can it make do without the
>> ZBBT?
>>
> Woops- missed this one. ZDDP additive is really only needed with
> flat-tappet cams, not roller cams.   And its only needed there if you're running
> seriously stiff valvesprings and aggressive camshafts, or to break in a new cam&
> new flat-face lifters. By 2500 miles, things are as broken-in as they're
> ever gonna get. I'd guess extra ZDDP won't make much difference in longevity
> with your engine. Royal Purple XPR race oil seems to help quite a few racers,
> and reportedly increases horsepower a liitle (10-40 bhp in a 600 horse-&-up
> engine) as verified on the dyno, but at $17 a quart/$150 a change, its
> becoming an investment! Some frugal racers run the same Royal Purple all year
> long, adding a qt as needed even after 'engine freshenings'. They just filter
> it and dump it back in.   By the time the oil is worn out, so are the rings
> and bearings and it's overhaul time. Good luck- J DeRyke
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