Mazda USA requires the use of light 5W-20 weight oil in the RX 8 but through out the rest of the world Mazda requires the use of heavier 5W-30 weight in the same engine.
In the USA with the lighter oil the motors are over heating in warm weather and the engines are failing in slow trafic and on long trips within about 15,000 miles . The engine seals are failing and compresion is lost with the oil blowing into the catalytic converter which then is also failing. These engines by nature run very hot in the first place.
The dealership says I will lose the warrenty and the engine will fail sooner if I use the heaver oil. I don't care about the warranty and more about the engine being dependable.
Mazda requires this light 5W-20 weight oil to meet MPG requirements set by EPA to avoid million+ dollar fines.
What do some of you think ???
In the USA with the lighter oil the motors are over heating in warm weather and the engines are failing in slow trafic and on long trips within about 15,000 miles . The engine seals are failing and compresion is lost with the oil blowing into the catalytic converter which then is also failing. These engines by nature run very hot in the first place.
The dealership says I will lose the warrenty and the engine will fail sooner if I use the heaver oil. I don't care about the warranty and more about the engine being dependable.
Mazda requires this light 5W-20 weight oil to meet MPG requirements set by EPA to avoid million+ dollar fines.
What do some of you think ???