Hey wuzzup man. I just got authorized a new engine myself It's in and running great! I always warm it up. At least til the line passes that little second line passed the C! That was the first time my engine wouldn't start on me. So we took out the spark plugs put some oil in there, and gave it about 15 cranks and then the engine came on. It was throwing all kind of smoke out the mufflers ran it out for bout 20 min. Car was good to go. About four months later. I was just cruising down the street at about 30 when the car just shut off! I had to get out and push it off the road. I checked the battery at Auto Zone. It was brand new still. So, I sent it to Mazda. They gave me the run around for like 6 months til they finally said they were going to pay for it. They said I was using the wrong oil. So, I had to fax everything to em. Oil receipts, brand new battery receipt. They were trying to charge me 7,000. I was like your crazy! So, they finally said it was a recall on the engine, and fixed it. I finally got it back now. I've had it for 2 months now. And it's good to go. Engine coolant light comes on after 70 mph. Y is that? Do you know?