[AdamIsAdam]

I found this page to be VERY informative. Assuming it' true. The gas in tank analogy was excellent and easy to understand for sure!

http://bestmotoroil.weebly.com/

And since I find the need to run dino and not synthetic oil (Syn caused more oil leaks for me for sure), I'm happy with my selection of Valvolin VR1 as being the highest rated, non-syn street oil. I just hope the 20W50 has the same rating as the 10W30.

7. 10W30 Valvoline VR1 Conventional Racing Oil (silver bottle) = 103,505 psi
zinc = 1472 ppm
phos = 1544 ppm
moly = 3 ppm

[rohrt]

Originally Posted by AdamIsAdam

I found this page to be VERY informative. Assuming it' true. The gas in tank analogy was excellent and easy to understand for sure!

http://bestmotoroil.weebly.com/

And since I find the need to run dino and not synthetic oil (Syn caused more oil leaks for me for sure), I'm happy with my selection of Valvolin VR1 as being the highest rated, non-syn street oil. I just hope the 20W50 has the same rating as the 10W30.

7. 10W30 Valvoline VR1 Conventional Racing Oil (silver bottle) = 103,505 psi
zinc = 1472 ppm
phos = 1544 ppm
moly = 3 ppm

Nice site. I don't remember if I came across that one or not.

Makes a good point about film strength.

One thing left out or just not that clear is, I have read in other places is that zinc\phos is still the best additive extreme pressure anti-wear additive made. The oil companies had to reduce the zinc because of the effect it was having the catalytic converter. They may have found substitutes to use, but I would question if they are better.

It makes it tough for anyone to compare if a oil is good or not. Look at these two oils that many here use and tell me what is better? Then look at the price.

6. SHELL ROTELLA T, 15W40 conventional, API CJ-4, CI-4 Plus, CH-4, CG-4, CF-4,CF/SM
“Load Carrying Capacity/Film Strength” = 72,022 psi
zinc = 1454 ppm
phos = 1062 ppm
moly = 0 ppm
total detergent/dispersant/anti-deposit build-up/anti-sludge = 2886 ppm
TBN = 9.1
The onset of thermal breakdown is approximately 250*
NOTE: This new Rotella T has SIGNIFICANTLY MORE zinc than the OLD Rotella T, NOT LESS as is often claimed. And these two Rotella oils were Lab tested more than a month apart. So, their component quantities had no chance of being mixed up. This new Rotella’s wear protection capability is just slightly BETTER than the OLD Rotella. Therefore, the new Rotella is NOT the junk some have claimed.


3. 5W30 Mobil 1, API SN = 105,875 psi
zinc = 801 ppm
phos = 842 ppm
moly = 112 ppm

[AdamIsAdam]

Zinc is still important, claims the author. But that more zinc doesn't guarantee a better oil.

Mobil 1 is synthetic versus the Rotella conventional, which is part of the price difference.

As I said, if his analogy of the gas tank is really accurate, then it makes sense that you only need enough zinc to get the job done and that more is not necessarily better. And I did read on manufacturers web sites that they say NOT to put additives in their oils. I am glad to read that. Additives always make me uneasy. Too many variables introduced.