Horsepower rating

[PayteKrum]

What is the horsepower rating at 87 or 88 octane? Just curious what it would make on that type of gas, will use premium for racing of course.

 

[D.J.]

oh boy, peoples OPINIONS are about to flood the thread.

 

[n8hegr8]

and the manual says.......................................only use 91 or higher, right? im pretty sure, i could be wrong though.

 

[AtomicGTL]

premium car premium gas

 

[D.J.]

and the manual says.......................................only use 91 or higher, right? im pretty sure, i could be wrong though.

My manual does not say that...

Mine says for max powah - use 91. and using less (87) could result in less POWAH and increased fuel consumption.

 

[Snicklefritz]

yep less than listed horse power and mpg is the price you pay for paying less for gas. that's it. and there are forum testifiers that assert they get better mpg on regular gas and never notice a power difference. my post is the tl;dr version of countless gasoline choices threads.

 

[nhcowboy28]

Be advised that each sticker adds 15hp…

 

[D.J.]

All winter long, I use 87 exclusively.

When my power significantly exceeds my winter tire traction, I see no point paying for more expensive 91 octane fuel.

To each their own.

 

[stoopid]

All winter long, I use 87 exclusively.

When my power significantly exceeds my winter tire traction, I see no point paying for more expensive 91 octane fuel.

To each their own.

That's prudent (assuming Kia did their due diligence and programmed/mapped the ecu fully for 87 octane).

 

[D.J.]

That's prudent (assuming Kia did their due diligence and programmed/mapped the ecu fully for 87 octane).

My 200,000 kms of warranty suggests to me, they did.

 

[Snicklefritz]

That's prudent (assuming Kia did their due diligence and programmed/mapped the ecu fully for 87 octane).

kia did, or else they never would have used the word 'recommended'. I just like the idea of running the fuel grade that doesn't required the engine to adjust to the lower octane.

 

[G70LEbyAdoom]

Probably around 39,360ish Duck power on 87

 

[Kodiack]

 

[DonD]

I simply don't know why people buy a performance car and try to run a lower octane than recommended.

If a bunch of factors stack up against you and you're using regular, I can't see how it's good for the engine. Hot day, heavy curb weight, uphill pass, full throttle for example. Don

 

[Black Beast]

Not to mention spark plug gap in the stock engine is set for regular 87 octane at the factory. Yes, for better performance use a better grade of gas. But if the stinger was meant to run on higher octane levels than 87, it would be printer, not only in the gas cover but also in the manual as (91 + Octane). I spoke with the mechanic in a rather lengthly conversation as he explained to me what happens when a lower grade gas is used. Not to mention that ALL presale tests are ran (including track) with premium gas in the tank. So without getting into too much detail. If you buy a vehicle because of its performance values, WHY IN HELL WOULD YOU RUN 87 OCTANE FUEL to begin with. JUST PLAIN STUPID. If you can afford the car, why not make it run at peak level.

 

[Thomby]

A few things to clear up here:
- Premium doesn't have more energy than regular, just more knock resistance, so unless you run timing right up to the edge of knock, it should not affect mileage
- Non-turbo cars that require premium do so because they're running a higher (static) compression ratio than regular can support
- Turbo cars have effectively variable (dynamic) compression ratio, so it's easier to tolerate a range of octanes, at the cost of boost (and timing advance)

So yes, if you run lower octane and drive aggressively, your power & torque will be capped. When @D.J. putters around on his ice roads off-boost, he's nowhere near knock-limited, so the lower octane isn't a factor. Just like when I putter around on my daily errands, my E30 mix isn't providing any benefits.

Insisting that a Serious Sports Car will suffer from lower octane when babied through winter is kind of like saying you have to run sticky summer performance tires year-round. Downgrading from 275s to 195s will limit your performance potential, but narrower winter tires are fine when you're barely breaking 1500 rpm.

 

[G-137674]

My manual does not say that...

Mine says for max powah - use 91. and using less (87) could result in less POWAH and increased fuel consumption.

View attachment 77533

I find it so hard to comprehend people buying a performance oriented car and then being a cheapskate by wanting to use lower octane gas than recommended by the manual.