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Geeze twitch, you're just lookin' for fights :P
All oils are not created equal, even when it comes to comparing conventional motor oils. Within conventional oils you have two major types. Parrifin (wax) based oils like Quaker State and Penzoil are generally ungood. They will protect OK, but when they break down, they will leave a waxy buildup. These oils MUST be changed at proper intervals. Other conventionals can last 5000 miles just fine under normal driving (spirited driving, you'd want to change more frequently). If any of you are old enough (or have dads old enough), motor oil was originally a 7000 mile job, before the Jiffy Lubes of the world sprang up.
APA and other government standards set the lower bound for performance.
And you're right about the oil manufacturers. Most house brands tend to be Penzoil ('cept Car Quest, they use Valvoline. . .)
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