Miatatude

The 2001+ Miatas, which the Emperor is one of, requires premium (91 octane) fuel because they bumped the compression, among other things, to increase the horsepower. Because of this I have been paying 20¢ more a gallon than must folks.

The car will run on lower octane gas because the ECU (brain) will compensate and adjust the timing so the engine won’t knock. When this happens the car will lose a few horses and the gas mileage will also suffer some. I have never cheated and run lower grade stuff, because even when the car is on E it only takes 10 gallons to fill up, so considering the downsides, saving two bucks more a tankful is just not worth it.

When I first got the car I was startled by a sort of abrupt surge in engine power as it passes up through 3000 RPM when the car is not fully warm. I wondered if there was something wrong because none of my previous Miatas did that. I checked that fountain of Miata knowledge, the forums on Miata.net and learned that that behavior was common in the 2001+ cars. They added a mechanical variable valve timing thingamabob and that in conjunction with ECU created that little surge which smoothed out after the engine was up to temperature.

Funny thing happened last Friday though, because Hurricane Ike created havoc with the gas supply in our neck of the woods, when I finally found a place that actually had gas for sale they weren’t selling premium. I filled the car up with mid grade (89 octane) and so far my butt dyno has noticed zero difference in pep. And as a bonus that, still surprising after all these years, 3000 RPM surge is gone. I didn’t check to see if the mileage was down, so tonight I filled it up with mid grade again. At the next fill up I’ll see if I end up getting less than the usual 27 MPG.

Literally.

I went out and took off the cockpit cover, so I could put the top up around 2:00 PM. I had checked the radar and it looked like we might get passing thunderstorm in the next half hour. I was right about the storm, but wrong about the time, it took about an hour and a quarter to get to us. I was also wrong about the passing part, that sucker stopped over us. It was still raining hard at our 4 o’clock quitting time. We decided to wait a while, the way it was pouring we would have gotten soaked getting to the car, even with the umbrella.

It was still coming down in buckets at around 4:30 and there must have been a dozen or so front office types hanging out by the door waiting for the break in the rain that seemingly might never come. Not being able to take it any longer, one of the QC engineers shouted, “I’ll show you how it is done!” and sprinted into the rain, disappearing front sight within 25 yards. Next a woman from HR removed her shoes and walked out under her umbrella. The exodus began.

At the end of the sidewalk at the the edge of the parking lot there are the storm drains, but they were not keeping up and causing a section that was under 4-6 inches of water between everyone and their cars. Our feet got soaked right from the start. Because of where the Emperor is always parked we had a long walk across wind swept pavement while some extremely large, unseen, being sprayed us with his garden hose.

I don’t even want to talk abut the drive home, there were several places that we almost floated….