http://en.m.wikipedia.org/wiki/Quaker_State
Bet you didn't know it use to be owned by the same company as Pennzoil, and now owned shell, producers of Rotella.
Quaker State oil is a good quality oil! Back in 1979 Quaker State was the top and most popular oil, some people seem to think if their car called for 10W-30 then sae30 should be fine! Not!! No detergent! So it sludged up engines! And Quaker State got the blame!!:thumbsdown: Quaker State is and...
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