Another familiar name on the 2010 NTPA tractor-pull circuit

Mobil Delvac isn't the only top diesel oil name you'll see on the tractor-pull circuit this season. Since I blogged about Delvac's involvement as sponsor of the big Tomah, Wis., tractor pull in June, I've taken note of another on-highway oil mainstay's sponsorship of the high-profile Koester Racing team. Pictured are the Shell Rotella-sponsored pullers of father-son team Larry (black) and Adam (white/black) Koester. The Koesters came away from Tomah with four top-ten finishes.   They're pullers with championship histories in the mini-modified ...

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