shell makes the motor oil it used to be valvoline in 2005- 2009 now 2010-2013 shell takes over work in the oil department its the truth.
Penzoil makes Quacker State Motor oil
mobil makes the oil
you use syncromesh pennsoil makes one you can get it at oreilly auto parts for 7.49 a quart
Advance motor oil is made by Coastal
PEAK makes peak motor oil, they are known for their antifreeze products before they launched their motor oil line. It's apparently already sponsored the IndyCar when it was first launched in 2007, and is being called "premium motor oil".
Omni specialty packaging makes the orilly brand oil
Advance motor oil is made by Coastal
If it is the conventional oil it REALLY does NOT matter who makes it. Most conventional motor oils are the same. With conventional motor oil just use the recomended viscosity and change it often.
Motor oil is more dense than gasoline. This is because motor oil is a heavier and thicker liquid compared to gasoline.
Edmuns.com has an article on it which says that ExxonMobil is a blender of Honda motor oil.
If you go to the Mazda web site it states Castrol motor oil is used.