yup...if you have issues, just up the octane....theres less oxygen in the air up there, which is why they done need the gas as combustible...
United States: in the Rocky Mountain (high altitude) states, 85 AKI is the minimum octane, and 91 AKI is the maximum octane available in fuel[citation needed]. The reason for this is that in higher-altitude areas, a typical naturally-aspirated engine draws in less air mass per cycle due to the reduced density of the atmosphere. This directly translates to less fuel and reduced absolute compression in the cylinder, therefore deterring knock. It is safe to fill up a carbureted car that normally takes 87 AKI fuel at sea level with 85 AKI fuel in the mountains, but at sea level the fuel may cause damage to the engine. A disadvantage to this strategy is that most turbocharged vehicles are unable to produce full power, even when using the "premium" 91 AKI fuel. In some east coast states, up to 94 AKI is available [1].
Yep, retards timing to prevent engine knock.RIT333 said:On regular, they will retard the ignition timing, resulting in less power.
Yep again. Hyundai obviously plays with timing and/or other factors to prevent knock on regular, at the cost of slightly less power. And trust me, nobody will notice the loss of 7 HP, it's less than 2%.GARYD said:If the manual says "REQUIRES" premium then you need to use premium.
If it says "RECOMMENDS" then you can use regular also.