Non ethanol or top tier?
I just found out that gas from certain gas stations is labeled as “top tier“ because it’s better than what they sell at other places because it has certain extra things in it. I’ve been getting premium non ethanol for my 1997 2.8L z3. I see some people saying to get the top tier gas because it’s better for your car, but I also see some people saying to get non ethanol. i don’t have gas stations near me that sells “non ethanol premium top tier” so I was wondering which one I should choose. I only ever have had a beater car that I just threw 87 gas from random gas stations into. I had no idea there was a such thing as top tier gas until today. Whenever I got my z3 I would just go to Walmart and get non ethanol premium since they’re the only gas station nearby that had non ethanol premium. Could someone let me know what gas you use for your z3 and what I should be using? It may be a stupid question but I’m getting mixed answers everywhere. It looks like there’s upsides to both but I can’t have both at the same time