The centerpiece television ad, featuring professional football star Bret Favre, suggests that viewers can “see the difference” by observing a sample of clear Pennzoil next to dirtier samples of other brands. A survey by Castrol indicated that many viewers concluded that the ads cite industry tests proving that Pennzoil with Purebase out-performed other brands in ways that would benefit motorists. According to Lubes-n-Greases, “the court called the campaign ‘repugnant’ to fair advertising rules of the Lanham Trademark Act; it ruled that Pennzoil did not pass tests that it claimed to pass, that the ads misstated the meaning of tests and that the Pennzoil product offered no better protection to motorists.”