It is recommended and you might get better performance and more life out of it. But you can run regular fuel in it
The S denotes the 2.3 Supercharged engine one the Mazda millenia (rather than the regular 2.5)
Well if it's supercharged, its the 2.3L. If it's the non-supercharged, then its the 2.5L.
Where is the AC recharge port on a 99 Mazda millennia supercharged
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The millenia P - has 2.5 liter engine, The Millenia S has a 2.3 liter engine
a Mazda millenia with a miller cycl engine 2.3 engine has 6 igition coils
The 626 and the Millenia share the same 2.5 liter engine,the only difference being the version in the millenia makes more power.
2.5L V-6 Mazda Millenia engine is a non-interference engine. If your timing belt pops, you will not damage your valves, like I did in my Diamante
if is the 2.3l, only when started the car,its the supercharged seal to will be replaced. Just'n Style
The Supercharged 2.3 liter will have a large piece of black platic over the top of the engine that says "MILLER CYCLE ENGINE" in large green letters and 2 small air-to-air intercoolers inside the engine compartment.
ENGINE COOLANT TEMP.SENSOR CIRCUIT
One the 2.3ltr (supercharged): ___1___3___5___ | | Psnger | | Drvr Side | | ___2___4___6___