Continuing the discussion from Gas price predictions?:
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Why do we need to continue that discussion?
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I’ll answer that one.
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Whatever meets your car’s minimum octane rating and no higher -
B100 Biodiesel (smells like 
may void warranty) -
Definitely not E85 (who wastes energy putting corn in their gas?) -
Hydrogen (station temporarily out of service)
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A $15K fueling card (I assume it’s a card) from Toyota, and I’m sittin’ pretty, buddy.
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The most abundant molecule on the periodic table. If the filling infrastructure was reliable I might join you - I short-listed one for last lease until I started checking my local stations, not so reliable.
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The best grade is what the manufacturer recommends, and the best gas will be ‘Top Tier’.
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I’m happy so long as the pump says 150 kW on it. Let Porsche drivers use up the super high octane 350 kW stuff.
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Articles I’ve read say manufacturers may recommend premium but if your car is tuned for mid-grade, it should be fine, though you may sacrifice a little performance boost. Just wondering…
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IIRC, this was my circumstance with my MINI Clubman. Premium gas was ‘recommended, but not required’. I ran the N12 normally aspirated, not the turbo, so I used regular unleaded for well over a quarter million miles with no issues.
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Some manufacturers like Mazda and Ford provide output figures for both regular and premium fuel on the turbocharged models.
For example, the 2.5T in CX-30, CX-5, CX-50, and CX-9 make 227 hp on regular and 250 hp on premium.
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There is the minimum and then the recommended… Always go with the minimum unless you’re motor is specifically tuned to take advantage of the higher octane. I believe most engines are tuned for the minimum grade available. In some cars you’ll lose power, but most people don’t notice anyways.
Just put the minimum required.
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Torque was the same tho IIRC.
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For the Mazda engines? I thought so, too, but I looked it up just now, and torque goes up by 10 lb-ft. I don’t know what the curves are like but can’t imagine either the inc’d HP or torque would be that noticeable in daily driving.
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