Amsoil is literally the first in Synthetic motor oils. Which was first developed for jet engines, back in the 1960's.
Other motor oils have slogans. Like they are the best, ect.
But amsoil, is the only oil, backed up by laboratory facts and test.
And its the only oil company, that has the balls to back up thier oil for 25,000 miles or one year.
Combined with thier EA oil filters, Which is made from Nano-fibers which trap up to 5 micron.
Compared to 25 micron with conventional oil filters. Which are made of cellulose, which is cotton.
The hot oils eventually break down the cellulose fibers, and seriously degrade the filtering process.
The synthetic nano fibers, not only catch smaller particles. They also flow faster and last a lot longer.
Instead of changing every 3,000 miles. You wont have to, for 25,000
Conventional petroleum based motor oils are dirty. They come from the ground, and are a mixed soup of chemicals. Only like one or two of the chemicals are actually lubricants. The rest actually cause damage to the engine.
Also Synthetic motor oils are the same consistincy at any temperature. At negative 70 degrees the oil still flows like it is supposed to.
But the petroleum based one, has waxed up, pretty much frozen.
Imagine the damage, the engine would have to go through before the oil was warm enough to actually lubricate agian.
Synthetic motor oils are also reign supreme in high temperatures.
At high tempertures, typical in internal combustable engines, petroleum based oils, boil.
The oil evaporates, thickens, and turns into tar.
While Amsoil, synthetic motor oils are barely affected by high heat.
Anyways, google it up yourself!! and tell me what you think
www.amsoil.com
peace