Yes. The Dodge Challenger when equipped with a 5.7 HEMI and automatic recommends 89 with 87 being acceptable, but if you get a manual transmission they require 91 or higher.
Because the engines have different ECU calibrations. The Lexus engines are tuned with more aggressive timing advance to extract more power when running higher octane fuel.
Yeah, the reality is if the car were designed for premium, the car isn't putting out the specs in the brochure on regular. Not sure why, but the opinions on this topic are always so extreme. One is you don't deserve the car if you use regular, the other is you're a fool burning money out the tailpipe if you use premium.
The only thing I would add is in the rare case where you have a knock sensor problem, which I did with the Maxima around 2014, then use premium until the sensor is fixed/replaced....I recall Mercedes Benz once stating we sell cars in every country in the world, and there are some that don't have premium. All our cars will operate on regular when premium is not available. I don't know if that position has changed today--because there are some really tiny 4 cyl turbos in existence....
When engine software is programmed to take advantage of premium fuel the vehicle will generate better emissions and better torque. Here's C&D article and take a look at the Ford 150 stats. On a side note the BMW M5 example is silly because C&D ran the car using 91 instead of 87. BMW min is 91.
www.caranddriver.com
This is the one statement that I've never been able to explain to anybody in over 25 years. The other one is the "how can I tell if my car battery is going bad" threads. I'll say try a load test, crickets, and there will be half a dozen more ways that people are trying.When engine software is programmed to take advantage of premium fuel the vehicle will generate better emissions and better torque. Here's C&D article and take a look at the Ford 150 stats. On a side note the BMW M5 example is silly because C&D ran the car using 91 instead of 87. BMW min is 91.
Is Premium Gas Worth It? We Test High Octane on 4 Popular Vehicles
We tested higher octane fuel than manufacturers require on the Honda CR-V, BMW M5, Ford F-150, and Dodge Charger to see if it impacted acceleration or MPG.
This is the one statement that I've never been able to explain to anybody in over 25 years. The other one is the "how can I tell if my car battery is going bad" threads. I'll say try a load test, crickets, and there will be half a dozen more ways that people are trying.
Raising the octane rating (also known as the anti-knock index) doesn't change the energy content of a gallon of gasoline.
Octane is not a measure of goodness, which for some odd reason, people seem to think of it as. Just like megapixels on a camera. Wow, you better have 24 or more, or you're so 1990s. Meanwhile all you need is 8 to enlarge to 8x10, which nobody does today (except portraits).
One myth I cannot stand, is, "I don't care if my owner's manual says 87. I get better mpgs when I use premium."
mpg is its own never ending topic, in itself
Yes, what I mean is that when you're driving a Toyota RAV4 designed for 87, and you tell the attendant at Costco to fill it premium, there's no benefit. But some will say it keeps their engines clean and they get better mpgs.
I use premium in my LS. All it does is allow the vehicle to put out close to the 278/312 in the brochure (2006 got clipped from 290/320 but it has to do with how measured). Jmoymmv Lexus didn’t invent a premium recommendation for the 3UZFE
It depends on the engine. Modern Mazdas will advance ignition timing if you use premium and get slightly better economy and power. I am not sure about every BMW, but recent M cars seem to gain power on dynos up to 100 AKI.
No, this is stupid. If a German car asks for 91 AKI minimum it's because the engine and tune are designed for that and anything less can cause detonation. If they had to make it fine for 87 they would have to back off on the timing. Do you really want to live on the edge and rely on the knock sensors with an expensive engine?
The 2013 GS350 is a different version of the 2GR than the ones on a Camry, Avalon, ES, RX, Highlander.
The 2012 ES brochure says regular, not premium.
