[QUOTE=I got this from Amsoil:
NOACK volatility test (how much it burns off over time)

Amsoil:5.44%
Castrol GTX-6.77%
Quaker State-6.97%
Mobil 1-7.49%

In the wear scar test, mobil 1 was last as compared to the following in order from #1 to last
Amsoil
Pennzoil platinum
castrol syntec
motorcraft synthetic
quaker state sythetic
havoline
mobile one(over double the other brands)

Filter efficiency:
Amsoil-98.7%
Premium synthetic brands, Mobil 1-80.23%
Conventional-39.39%

And from the makers of Amsoil also comes NGK spark plugs, which we all know and love. They also do the arfilters for Injen intakes.


I would compare Amsoil to slick50. If you are okay with spending the money, go for it. I am definitely ok with it for once a year oil change, especially in my expedition.[/QUOTE]

When a company releases data and they are #1 in all catagories. Yeah I beleive that. I also have had troubles with NGK and Slick 50 is also known to cause as many issues as it purportedly solves. I notice a lot of studies do not compare to like products.