Cheap alternative to pricey flat tappet oil in street cars...

crackedback said

Dave,

I did a quick and dirty spreadsheet to compute how much lucas break in you'd need to put in with a std shelf oil assuming the lucas has that Zn and Ph content. Here are some numbers that makes your solution an even better choice.

Shelf oil with 1000 PPM of each requires ~.3 Qt of Lucas in a 6 Quart oil change to reach the desired high end numbers you posted.

If the shelf oil has 800ppm of each, the Lucas required is ~.5 qt.

That makes the solution even less expensive.

Click to expand...

Nice.

I was doing my math with zero zinc levels. I know that Brad Penn's conventional has none. I'm only going to assume, because I haven't asked any other reps, but I believe that this move made by them was nothing shy of an industry standard.

Their Penn Grade 1 is the stuff with 1100ppm zinc and 1300-1400 ppm phosphorus.

Zinc levels are way down, but I'd like to know what the industry standards are for phosphorus in conventional oils (SL rated), because phosphorus is even more important than the zinc.