Today I noticed my overflow tank didn't have a coolant in it. So I opened the cap and I didn't see any fluid in the radiator under cap. So I was next to napa and figured id better get some antifreeze in there. The manual calls for ethylene glycol antifreeze. So the guy at the desk got me the napa long life any make or model brand. He said it was fine for my car. When I got home I forgot I had a gal of supertech long life any brand or make but I noticed the supertech besides having ethylene glycol it also has diethylene glycol. would it be okay to use both of these. The napa or supertech. It didn't use much at all to fill to the full line on the overflow.