Premium Fuel or Regular

[px3_taco]

Different ecu calibrations and power/torque outputs can lead to more knock with lower octane gas so they recommend a higher octane that meets their needs.

It’s the same engine. In every way. I run premium in both.

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[goin2drt]

Same engine DOES NOT equal you have to run the same octane.

 

[JayTech]

It’s the same engine. In every way. I run premium in both.

Same engine but the calibration isn't necessarily the same. They can have identical torque and hp numbers and still have a different calibration. There are a lot of variables.

 

[SpartanCaptain]

Dyno tests on youtube show a 20hp gain going from 87 to 91.

 

[HarryDaHamster]

After watching this video, I use premium. No cheaper way to add horsepower

 

[JakeJoeBob]

So here is the deal, 91 octane bumps the power of the engine by about 20hp and 14lb-ft of torque and maybe a bit more in some cases (ive seen a few different dyno charts some being higher than those number but no lower). Truck runs smoother, mpg is better. Turbos like higher octane. 87 is fine if you don't care about that though.

 

[MT-Taco]

Premium, ethanol free. Feels as strong as my 5.7 tuned Tundra did, minus the gear hunting.

 

[bigd9247]

Premium

 

[crepr12]

Your mula..when I get my limited it will be what the manual suggest...Except I'll change my oil every 5k or six months...my mula

 

[cswitz]

After watching this video, I use premium. No cheaper way to add horsepower

Same, I saw this video shortly before picking up my 24 and it’s been only Premium for me. Also only Top Tier stations, usually Costco for price. I’ve been averaging 22-24 mpg per tank mixed city/highway, and I’ve gotten has high as 30.2 over 60 flat miles moderately babying it, or 26 up the foothills (~2000 foot elevation gain) and back down on the same trip not trying.

I think the Premium gas is worth it for the turbo and so much better mileage than my 3rd gen ever was. I also think a cost of the turbo is more frequent oil changes, I’m aiming for ~5k miles after the break in period.

 

[CanyonFisherSummitSeeker]

What do you mean when you say "top tier fuel?" I've only ever used 87, and most of the time, I try to get it from the Sunoco near my house, but I feel like all gas, for the most part, these days comes from the same places/refineries regardless of which gas station you are buying it from. Do you mean like a specific brand or brands of fuel, or are you talking about fuel with a higher octane rating? To be honest, I was kind of surprised that these new engines didn't require the higher octane fuel like every other turbo charged vehicle I've ever owned, but they call for 87 octane, so that's what I put in it lol. I'm not complaining either!

The manual actually calls for “87 or higher” and states “research octane number 91”. So I believe MPG numbers, torque, etc were all acquired with 91 octane. At least that’s how I interpret the manual.

Top Tier is a designation given to fuel companies that exceed EPA minimums for detergent additives, engine performance, and cleanliness. There are a bunch of top tier companies. Chevron, Shell, ARCO, Mobil, Valero, Costco, and probably quite a few other companies.

 

[Kdbradley85]

The manual actually calls for “87 or higher” and states “research octane number 91”. So I believe MPG numbers, torque, etc were all acquired with 91 octane. At least that’s how I interpret the manual.

Top Tier is a designation given to fuel companies that exceed EPA minimums for detergent additives, engine performance, and cleanliness. There are a bunch of top tier companies. Chevron, Shell, ARCO, Mobil, Valero, Costco, and probably quite a few other companies.

Thanks! I saw that in the manual too. I think you're correct regarding the "research" number too. Fortunately, I've been using Top Tier gas exclusively without realizing it, but unfortunately, I've just been using 87. I haven't noticed any issues, and I'll likely continue using it since I'd rather prefer to continue using the fuel card I have for work and don't wanna have to try to justify the "need" to purchase higher octane fuels. I don't get the best fuel mileage (roughly 300 miles per tank - that's when the truck says to fill up with only a few miles of range remaining), but I also have slightly larger and heavier wheels and tires and don't do a ton of highway driving. It's also a six speed, and I like to have fun lol. If I know I'm gonna be doing some extra hauling or putting the truck through a higher than normal work load, I may switch to 91, but it seems to run just fine on good 'ol 87. I've got about 11K miles on it so far and haven't had a single issue. I did my third oil change at around 9K miles, and I'm trying to stick to oil and filter changes between 4-5K miles.

 

[ixo]

this will be unpopular, but you don't just "use better gas" if the engine is tuned to run 87, which these are. the octane rating only determines the pressure required to detonate, so if an egine expecting 87 gets 91 put in it, it's not "better because it costs more", it expects a certain pressure to combust, and you're skewing that value.

 

[MT-Taco]

this will be unpopular, but you don't just "use better gas" if the engine is tuned to run 87, which these are. the octane rating only determines the pressure required to detonate, so if an egine expecting 87 gets 91 put in it, it's not "better because it costs more", it expects a certain pressure to combust, and you're skewing that value.

The engine will adjust accordingly if you run 91+ octane. Plenty of dyno runs and confirmed by OTT.

 

[ixo]

The engine will adjust accordingly if you run 91+ octane. Plenty of dyno runs and confirmed by OTT.

While the knock sensors can adjust the skew, you don't NEED to run these higher octanes. The engine is built expecting 87, and i honestly just like to keep it vanilla. If you flash an ECU tune that expects 91, then sure.

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