EXHIBIT 99.13 FIRST AMENDMENT TO 1994 DIRECTOR NON-QUALIFIED STOCK OPTION AGREEMENT OF MOTORVAC TECHNOLOGIES, INC. THIS FIRST AMENDMENT TO 1994 DIRECTOR NON-QUALIFIED STOCK OPTION AGREEMENT OF MOTORVAC TECHNOLOGIES, INC. (the "Amendment") is made by...Non-Qualified Stock Option Agreement • December 28th, 1998 • Motorvac Technologies Inc • Misc industrial & commercial machinery & equipment • California
