If you live or have visited a region with a high elevation, you may have seen gas for sale with
an octane rating of 85.
With
an octane rating of up to 130, NG has the potential to optimize an engine's thermodynamic efficiency through a high compression ratio.
Unfortunately, the «flex fuel» vehicles sold can't take advantage of the high
octane rating of E85, because the engines need to also burn regular gas.
Regular gas has
an octane rating of 87, mid-grade or «Plus» is 89, and premium fuel typically has
an octane rating of 91.
In relation to
octane rating of fuel, the PCM retards ignition timing as needed to forestall detonation.
E85 biofuel has a very high
octane rating of 105 but a lower energy content that requires a 30 per cent increase in the engine fuel flow rate.
E85 is 85 % ethanol and 15 % gasoline fuel blend that carries
an octane rating of 105 PO...
The octane rating of typical commercially available gasoline varies by country.
If unleaded gasoline with
an octane rating of 93 (98 RON) is not available, unleaded gasoline with
an octane rating of 91 (95 RON) may be used with no detriment to engine durability or drivability.
When phase separation occurs,
the octane rating of the remaining fuel can drop by as much as three points.
The octane rating of the fuel is really nothing magic.
It is determined empirically in a special running test engine where you run the fuel, determine the compression ratio that it detonates at and compare that to a standard fuel, That's
the octane rating of the fuel.
There are cases documented where is was illegally used to increase
the octane rating of cheap fuel (google «Firepower ferrocene spark plugs»).
There are cases documented where is was illegally used to increase
the octane rating of cheap fuel (google «Firepower ferrocene...
The compression ratio of the engine, i.e. how much pressure the gasoline mixture is put under, has a direct correlation, then, with the recommended
octane rating of the vehicle.
«Some racing fuels today still use lead compounds for boosting
the octane rating of the fuel,» said Mathur.
It replaces some other quite nasty additives to increase
the octane rating of the gasoline.
Not exact matches
With a reputed vacancy
rate of less than 2 % on more than 40 million square feet
of industrial, office and retail property in the GTA, the company is known for moving fast, despite the high -
octane distraction
of the Canadian Tire Motorsport Park, Fidani's pet project.
Just as a typical oil refiner cracks petroleum into a mixture
of hydrocarbons ranging from ethane to jet fuel, Virent transforms sugars into a fuel that has a 102
octane rating.
Take Every Wave: The Life
of Laird Hamilton Not
Rated Available on Disc and Streaming Rotten Tomatoes Score: 76 % From Oscar - nominated documentarian Rory Kennedy (Last Days
of Vietnam), comes this high -
octane thrill ride
of a look at the life
of one
of the greatest surfers to ever grace pop culture.
The idea
of a road trip in an RV loaded with high -
octane pot and a pretend family certainly has some R -
rated comic promise.
Arriving Saturday night is an extended version
of the high -
octane The Fate
of the Furious (2017, not
rated), the eighth film in the car caper franchise with Vin Diesel and Dwayne Johnson, featuring footage not seen in theaters.
But like its predecessors, this R -
rated movie also packs the explosive combo
of kid - appeal and high -
octane violence — a chemical formula that should give parents a clear answer to the question
of, «Should I take the kids?»
The added lead increased the
octane value
of the fuel which gave the engineneers
of old a better way to control the combustion
rate in the internal combustion engine.
The
octane rating for a vehicle can usually be found inside the owners manual (depending on your area you should see at least three
of these as your average pump 87,88,89,90,91,93).
Over here, premium is ONLY a designation
of octane rating, and has nothing to do with the additive package, etc..
A diesel engine has an expansion ratio approaching 30:1 whereas a gasoline engine rarely can exceed 13:1 due to considerations
of detonation with average fuel
octane ratings.
Of course, it makes only 30 hp SAE gross (25 hp by German DIN measurements), but you have to remember that the European gasoline of the time had a very low rating, perhaps 60 octane, and you can't expect much power from a compression ratio of 5.8:
Of course, it makes only 30 hp SAE gross (25 hp by German DIN measurements), but you have to remember that the European gasoline
of the time had a very low rating, perhaps 60 octane, and you can't expect much power from a compression ratio of 5.8:
of the time had a very low
rating, perhaps 60
octane, and you can't expect much power from a compression ratio
of 5.8:
of 5.8:1.
Higher
octane ratings correlate to higher activation energies: the amount
of applied energy required to initiate combustion.
While the green - themed new Ecomotive with its road tax - busting CO2
rating of just 99g / km is all about economy and environmental responsibility the 265 PS Cupra R is, undeniably, aimed at ultra-hot hatch enthusiasts with high
octane fuel coursing through their veins.
According to the manufacturer, the hybrid model has EPA - estimated
ratings of 43 mpg city and 40 mpg on the highway utilizing regular 87 -
octane gasoline.
Using higher volume blends
of ethanol to leverage the alcohol's inherent high
octane rating to produce ethanol - gasoline blends with higher
octane numbers could yield «substantial societal benefits», according to a team
of researchers from Ford Motor Company.
1980 The APC system protects the engine from injurious knocking due to uneven fuel quality and enables the engine to be run on petrol
of various
octane ratings.
FAST FACTS — RENAULT MEGANE R26.R Type approval CM2H96 Engine Type F4R * 774 Position Front transverse, angled 8 degrees towards rear Depollution standard IF Euro4 Type 4 cylinders in line Number
of valves 16 Balancer shafts No Block / cylinder head Cast iron / aluminium Cubic capacity (cc) 1,998 Bore x stroke (mm) 82.7 x 93 Compression ratio 9:1 Maximum power (kW / hp) at 169/230 at 5,500 rpm French fiscal
rating 14 Maximum torque (Nm) at 310 at 3,000 rpm Injection type Multipoint Fuel Lead - free 95 and 98
octane Flywheel Twin - mass damping flywheel Catalytic converter One primary converter
Available in standard and Premium models, the CT 200h boasts remarkably low fuel consumption and has an impressive combined EPA - estimated fuel economy
rating of 42 mpg, 43 mpg city and 40 mpg on the highway utilizing regular 87 -
octane gasoline.
Its engine, for example, runs on regular 87 -
octane gasoline while delivering a fuel economy
rating of up to 28 mpg.
Power is
rated at 240 horsepower and 270 pound - feet
of torque with a tank full
of premium gasoline — although it will run just fine with 87 -
octane regular fuel as well.
Taking advantage
of E85's favorable
octane rating, the engine was calibrated to deliver a few extra horsepower, with the exhaust exiting through GM Performance Parts» new headers.
All
of the first - generation 3.5 L engines were
rated at 217 hp (162 kW) with 16/24 city / hwy mpg and called for 89
octane fuel.
Engine timing could either be advanced or retarded slightly, but the system wasn't smart enough to take advantage
of changes in atmospheric pressure, fuel quality,
octane rating or temperature.
If a blend
of gasoline provides the same knock resistance as a mixture
of 87 percent isooctane and 13 percent n - heptane, it gets an 87
Octane rating.
(That figure is slightly lower than the the car is
rated for elsewhere, thanks largely to higher
octane fuel in the rest
of the world.)
eTorque doesn't add to the power
ratings; the V6 stayed at 305 hp and 269 pound - feet
of torque, on regular 87 -
octane fuel, while the Hemi stayed at 395 hp and 410 pound - feet.
A group
of researchers from MIT found that when vehicles run on fuel with a higher
octane rating, they gulp down between 3 % and 4.5 % less gas.
stevepostrel — and what's wrong with a 10 % blending
rate of ethanol for
octane and oxygenate requirements?
A product
of petroleum refining, propane is available for vehicular use and has a high
octane rating.
Some
of these are supposedly better than others, but what is
Octane and what does the
rating on the pump really mean?
American refineries have continued to produce diesel with a lower cetane number — a measure
of the fuel's ignition quality, like the
octane rating for petrol.