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2022 Preferred w/Trend Package
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Hey guys

Was just wondering what type of fuel do you guys plan to run in your SC? should I be running 91 on the break in? or should I just stick to 87 in my terrain I had to run 91 when I was towing my trailer should I be doing the same with the SC? couldn't find anything in the manual saying what type of fuel to use or I'm just blind and missed it
 

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'23 Limited AWD Blue Stone
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The manual says 87.

I wouldn't bother with 91 unless it starts pinging. My old Ranger would ping while towing with the AC on in the FL heat, but never had that problem with my newer (still 20 year old) Dakota. That 4.0l V6 Ranger was seriously under-powered having only 160HP yet still somehow rated to tow 5,700lbs.
 

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2022 Santa Cruz Limited, Sage Gray
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197 Posts
Compare it to the Ford Rangers engine, 2.3L engine that makes 270 horsepower and 310 lb-ft of torque on 87 octane to the Santa Cruz's 281 horsepower and 311 lb-ft of torque.

All things considered for it's displacement it's likely got a fair amount of overhead in terms of pinging.

The Ranger has an OEM tune available on 93 octane that raises the engine up 45 horsepower and 60 lb-ft.

Either way, run the fuel your car is designed and tuned for, otherwise you're wasting money fighting detonation that more than likely is not occurring.
 

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2022 SEL Premium / Preferred Trend
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94 Posts
The manual (1-5):
“Your new vehicle is designed to perform optimally using unleaded fuel having an octane number ((R+M)/2) of 87 (Research Octane Number 91) or higher.”

Sales guy told me just plain ole 87. We can ignore “Research Octane Number 91” yes?
 

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Phantom Black Limited AWD
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Octane rating formulas could vary from country to country.
In the U.S. & Canada, we use the (R+M)/2. Research Octane Number (RON) is usually used in Europe and Latin America.
So using what we know as 87 (which is equivalent to 91 RON) is perfectly optimized for our SCs.
 

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I called my dealership about this question. Although the manual might say you can run it on 87, the technians I spoke with recommended to use 91 if you have the turbo. Using 91 with a turbo makes sense since it is a high compression motor.
 

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Taking one anecdotal dealer-based tech's word for it over the Hyundai engineering team? Your money to waste, I guess....

Even the statement about high-compression is off, it's not the engine compression (which typically starts LOWER on turbo and supercharged engines) it's actually the additional combustion chamber pressure from the additional atmospheres of pressure (and heat) that can cause pre-detonation, and Hyundai has done the math, so stick with the MANUFACTURER recommendation unless you reprogram it with a tune that can take advantage of the extra octane. Otherwise you're just blowing that octane and your cash straight out the exhaust.
 

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Hey guys

Was just wondering what type of fuel do you guys plan to run in your SC? should I be running 91 on the break in? or should I just stick to 87 in my terrain I had to run 91 when I was towing my trailer should I be doing the same with the SC? couldn't find anything in the manual saying what type of fuel to use or I'm just blind and missed it
The manual calls for 87
 

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Taking one anecdotal dealer-based tech's word for it over the Hyundai engineering team? Your money to waste, I guess....

Even the statement about high-compression is off, it's not the engine compression (which typically starts LOWER on turbo and supercharged engines) it's actually the additional combustion chamber pressure from the additional atmospheres of pressure (and heat) that can cause pre-detonation, and Hyundai has done the math, so stick with the MANUFACTURER recommendation unless you reprogram it with a tune that can take advantage of the extra octane. Otherwise you're just blowing that octane and your cash straight out the exhaust.
10.5 to 1 is high for a Turbo. Especially one not running alcohol. The NA is pretty dang high. Either way. And the hp from a 2.5 with over 13:1 is suspect. I believe they are making up for the compression by killing the cam timing just to run 87. Otherwise a 13:1 2.5 would have more HP. But Either way, your right, the car will retard the timing to whatever extent it needs. Knock hasn't really been an issue since variable valve timing and computer controlled spark and fuel. The vehicle will vary the afr and timing of the engine if stressed from towing or altitude or heat soak or whatever and cut back power. 93 will allow it to adjust less.

I still haven't seen a car on the dyno that didn't make a couple more HP with 93 than 87. The car advances the timing up to the point of knock and backs off. More octane gives it more advance room. But the hp isn't a noticeable amount. Many vehicles do say run 93 for towing. Even old ohv v8 with no cam timing adjustment. The engine gets stressed towing and 93 will resist early detonation or knocking so the engine can hold more performance without having to retard timing or adjust afr

I don't know how the Hyundai works, but GM and Ford both use fuel analysis every fill up that does use a different map for 93 or e-85.

People are willing to pay 400 dollars for an intake that makes the car make a sucking sound while not making any HP (ive seen them lose HP actually). Change out a vent metered air BOV to an atmosphere release version just to go psssh when they rev up. So it's up to the buyer of they want to spend a dollar a gallon to get 2-3 HP. But more money is spent on K&N, resistors on the MAF, fans in the intake, magnets on fuel lines, spirals on throttle bodys etc etc etc and other gimmicks that used to claim more HP.
 

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2022 Santa Cruz Limited
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Purely anecdotal but Sheets, a regional chain, has been offering their E88, up to 15% ethanol, for $1.99/gal, vs $3.11 for reg87, over the Thanksgiving holiday. I wanted to give it a shot and over the last 2 days I've done bit of road travel about 520mi total. No noticeable performance differences and managed a little over 28mpg on the way to the mountains and averaged 31 on the way home all running between 70-75 mph. A previous trip to Hilton Head on completely flat highways averaging same speeds running reg87 resulted in just under 28mpg. Once additional variable is the tonneau cover was open and tailgate was down with extender on the return trip. I'll have to revisit regular pricing once the promo pricing is over but at a 36% discount vs reg87 I run this stuff all day everyday.
 
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