I'm pretty sure that you can use 95 octane rating gas in that car.Not sure if that's premium in your country.
My 2003 eclipse spyder gt 6 cylinder owners manual says to use premium.
My 2003 3.0 Litre eclipse spyder owners manual says to use premium with a minimum octane rating of 91,but you may use regular unleaded with a minimum octane rating of 87 if premium is not available.I've only used premium in mine and am very happy with results so far.
2003 blazer with a 4.3 does not need premium gas, but should not knock unless there is water in the gas or you are using ethanol based gas. It would not hurt to try a bottle of injector cleaner, I prefere Techton but others will do. also chech your air filter.
No, It will run just fine on 87. But higher octane won't hurt it. If you have the MazdaSpeed 6 it does require premium due to the turbo.
NO.. it does not need premium gas.. You only have to put premium gas in a car which recommends premium gas. I would recommend a fill up with some mid grade gas atleast once a month...
yes premium gas is required
not unless you have diesel.
yes
Absolutely...it will run much worse using non-premium gas.
Use what the manual tells you....regular gas.
Yes you can and you will feel the difference in power .
if you have a turbo engine you need premium gas, look inside your gas tank door and it will tell you what octane your car requires.