what kind of oil

this stuff and the price is cheapest i ever seen it

[ame="http://www.amazon.com/Valvoline-VV851-Racing-STREET-Bottles/dp/B000GAP42I/ref=sr_1_3?s=automotive&ie=UTF8&qid=1315782760&sr=1-3"]Amazon.com: Valvoline VV851 Racing 20W50 NOT STREET LEGAL Motor Oil, Pack of Six 1 Quart Bottles: Automotive[/ame]