Steve Lefevre drives a Jeep Wrangler - The only open top Jeeps produced in the show's time-line were the "CJ" models. The Wrangler open top Jeep was not produced until 1986, and the style he drives ("TJ"-Model) was not manufactured until 1997.
There were no pop-top squeezable mustard and ketchup bottles in 1985.
Guy shown using spray-on sunscreen.
At the 4th of July party, bottles of Jagermeister are visible on a outdoor table. However Jagermeister did not enter the American market until at least 1990, and didn't become popular until about 1998.