Piston Slap: Fuelish Thoughts on Engine Calibration

TTAC regular PrincipalDan writes:

Sajeev,

With the price of gas dropping to levels not seen in many moons, a thought occurred to me: Many of us are driving around in an average vehicle that has an engine used by another vehicle advertised as having more horsepower and recommending premium fuel.

For example: Toyota’s 3.5-liter V6 powers the Camry and ES350, but the Toyota’s tests with 87 octane fuel while Lexus tests with 91 octane fuel.

Do the manufactures actually bother using different engine programing in these various vehicles? Or is greater horsepower just a premium fill-up away for those with lowlier vehicles with premium antecedents?

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Digestible Collectible: 2001 Ford Mustang Bullitt

I’ve stumbled down a deep and dangerous rabbit hole, and it all started with a jerk nearly hitting me. The jerk in question was driving a tuned SN95 Mustang, swerving in and out of lanes on the interstate without signals, and timed his maneuver around my slow van poorly.

It was hard to stay angry, however, as he dropped a gear and the Modular V-8 snarled enticingly. I drove home and opened up some browser tabs. And more. And more still. As I write, I have twenty tabs open, filled with cars for sale, suspension setup tips, and performance parts catalog houses.

I need help. Or winning lottery numbers. That’d be just as good.

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  • CanadaCraig As an aside... you are so incredibly vulnerable as you're sitting there WAITING for you EV to charge. It freaks me out.
  • Wjtinfwb My local Ford dealer would be better served if the entire facility was AI. At least AI won't be openly hostile and confrontational to your basic requests when making or servicing you 50k plus investment and maybe would return a phone call or two.
  • Ras815 Tesla is going to make for one of those fantastic corporate case studies someday. They had it all, and all it took was an increasingly erratic CEO empowered to make a few terrible, unchallenged ideas to wreck it.
  • Dave Holzman Golden2husky remember you from well over decade ago in these comments. If I wanted to have a screen name that reflected my canine companionship, I'd be BorderCollie as of about five years go. Life is definitely better with dogs.
  • Dave Holzman You're right about that!