[Fot] VR-1 Oil

[Duncan Charlton]

Just to refresh my memory I had a look at some of the archived discussions on
bobistheoilguy.com.  It may not be news, but we shouldn't lose sight of the
fact that it's not all about maximum ZDDP.  Some consider 1800ppm to be the
upper safe limit due to corrosion of some camshaft materials and that anything
above 1500ppm after break-in is unnecessary.  Mobile 1 racing oils have
1750ppm, VR1 conventional has 1300, B-P oils have 1300ppm, Redline race oils
have 2500ppm, Rotella 15W40 has about 1300.  Depending on what research one
sees, an adequate level ought to be 1100-1500ppm.  Aircraft mechanics point
out that oil viscosity has something to do with cam lobe wear, too -- those
who are flying non-certified engines are free to substitute oils, and wiped
out lobes are usually traced back to low-weight oil, ZDDP or not (one mechanic
mentioned that certified engines "don't use any ZDDP" but I haven't attempted
to confirm that).

Duncan (using Rotella 15W40)
Texas
1952 Morgan Plus 4
#6 red

On Apr 20, 2013, at 6:40 AM, Bill Tobin wrote:

> It's not always all about price.
> Maybe you like the product. If we can save a few bucks and get our usual
stuff, why not?
> I agree with you about the costs of vintage racing, but if you have had
sucess in the past with a product, why not stick with it?
> That's why there are many oils on the market. Choose the one you like.
> Cheers, Bill