If you think Royal Purple is good, you should try Torco MPZ. I put it in my
truck once, and I swear I was getting 10% more mileage. On the next oil
change to Mobil 1, it went back to normal. I'd like to use Torco, but at
$10 a quart, it's not worth the extra mileage. I use it in my Racecars;
Drag, Drift, Auto-X, etc.

Technically, The difference is what weight you use. If your V-8 runs on
20w50, and you decide to put in 5W50. You'll definitely see an improvement,
dino or synthetic. All Synthetic motor oil is the same. When comparing
synthetic to synthetic, its the stabilizers used. Most commercial
synthetics, use Zinc as a stabilizer. Torco uses MPZ instead of Zinc. MPZ
has less friction, than Zinc. As a matter of fact most Top Fuelers use
Torco, even though they are sponsored by another oil company, and they pay
for the Torco oil.

"Nacho" <c.calixto@verizon.net> wrote in message
news:rS92b.10439$vy5.4561@nwrddc01.gnilink.net...
> Has anyone had any experience (good or bad) with Royal Purple? I'm
> considering it for my next oil change. They dyno'd a V8 camaro after and
> before putting in Royal Purplr and it clearly showed an 8-hp gain... wow.
If
> a good experience, how can an oil make more horsepower? and how
> (technically)?
>
>