What fuel do you use?

[Neo1967]

A gas thread- a sure fire way of instigating a futile debate

So, in conclusion: put whatever gas makes you sleep better at night. Save the debating for things that actually matter like Coke vs Pepsi, IOS vs Android, or if a pound of bricks falls quicker than a pound of feathers.

Engine knock..rings and valves..pre-detonation..stick with what the manufacturer reommends as a few extra cents per gallon will save you money in the long term.

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[Bflood]

The Supra can handle full E85 with a tune.

The Supra can handle e50 with just a tune but you'll need to pick up Pi and added lpfp if you want the full potential of e85. Totally worth it though.

 

[SupraGR21]

my .02:

Turbo motors= 91 octane or better
Gas stations= Chevron or at least Shell all others are crap

I have done extensive testing personally on many different plat forms and regardless of what people say higher octane does produce a smoother engine(when its a high performance engine or turbo'd car). For the gas stations, Chevron really does use additives which keep your engine clean and have a better cleaning fuel mixture. Only data I have is my own personal experiences from decades to see the effects of type of gas and what octane with different engines.

 

[vb22]

Everyone jumping on OP's back, I have seen people put regular gas into much more expensive cars than the Supra.

 

[diablo2112]

Everyone jumping on OP's back

No big deal. Many people have deeply held opinions, obviously. Doesn't bother me in the least.

 

[DAC17]

I really fail to understand why people buy a performance car, disregard what the manual says, and try to nickel and dime clear recommendations. 91 or 93, depending on your state...

 

[Snorlax27]

Here was a little snippet from a car and driver’s article that tested various octane gas in multiple vehicles.

Not entirely shocking. Settling for lower octane fuel for a vehicle calling for higher octane leaves performance on the table. This is not a moot point. Likewise, putting higher octane in a vehicle that doesn’t call for it is essentially “burning money”- hehe.

There are other considerations to take into account like fuel economy or gas savings buying lower grade fuel. All things considered, it’s your vehicle and it’s your decision what fuel you dump in it. You can find the entire article here:

https://www.caranddriver.com/features/a28565486/honda-cr-v-vs-bmw-m5-ford-f-150-dodge-charger/

 

[piper1]

Like many others already have said, why buy an expensive sports car just to cheap out on gas and affect performance, even if it's daily and not pushing it. I always would want my car to perform at it's best, else why buy it? One back and forth that is the debate is fuel economy/performance. The mustang ecoboost I leased stated can use 87 but all fuel/performance ratings are based with 93. So in terms of the mustang they boast the best fuel economy/hp/tq on 93. Why would they put a lower rating on fuel economy with 87 being used? Part of marketing, you put your best numbers in the best situation to sell, not the mediocre. Hence why BHP not WHP is listed to sell sell sell.

I know different industries, but look at it like this.
In a previous life I was very heavy into archery. Bows are rated in IBO (international bow hunters organization) and AMO (archery manufactures organization). IBO is based at higher draw length than average, no string accessories, 70lbs draw weight and the lightest arrow without doing harm to the bow. In these specs the bow will shoot an arrow at it's absolute fastest in controlled environment. AMO is more real world average joe setting. Shorter draw length 60lbs draw weight heavier hunting class arrow. In honesty the average person gets in the middle between ibo and amp typically, but plenty don't get why at 5'8" the same bow shoots faster for the 6'3" guy next to them.

Take that into account when a car company recommends what fuel to use to give you the optimal out of the car as what IBO specs are for archery. Will either amo or ibo hurt a bow, no it's just how they base archery industry standards unlike what we're talking about here.

But if using higher grade fuel will prevent "possible" knock for a car I'd hope to keep for a long time to come, then I'm going to do my best to not only "hopefully" prevent issues down the road, but also take full advantage of the full potential of the performance of my car 100% of the time.

What surprises me is the company is telling you using lower will "possibly" produce knock, why on earth with all the problems that are to potentially come up in the cars life time of your ownership would you ever want to put it into the "possible" situation in the first place? Not a jab to anyone here as I do understand the differences in elevations and so forth but still, You know it's a possibility to happen, and if it happens a lot you know there ultimately will be a stress point if it continues and something will break, as they always say the weakest link is the first to break. Why not do what you can to prevent more headaches down the road? Best problem solvers are always the best problem preventers.

 

[RWhiz]

Only Shell 91. I have shares of RDS-B and always loved this commercial:

 

[SupraGR21]

Only Shell 91. I have shares of RDS-B and always loved this commercial:

This was just purely amazing! I had to go back and look at the detailed transition on the car from scene to scene. Thanks for sharing this!

 

[Supraboi7]

Revisiting this thread due to NC gas shortage...how bad am I screwing my car if put a few gallons of regular in? There's no premium gas anywhere to be found and it hurts my soul to pump this garbage juice down my cars throat lol. I'm driving like granny and sport mode off to go easy on her

 

[Rocksandblues]

You will be fine with no tune. The computer will adjust. Obviously you won't have the performance or mileage

 

[Loco38SUP]

I only use 91 octane or higher. The 87 octane just doesn’t produce big flames. What’s fuel economy again? ?

-RJM

 

[HookemNC]

Revisiting this thread due to NC gas shortage...how bad am I screwing my car if put a few gallons of regular in? There's no premium gas anywhere to be found and it hurts my soul to pump this garbage juice down my cars throat lol. I'm driving like granny and sport mode off to go easy on her

Sheets has e85. Just add a couple of gallons of e85 and it will push your octane to suitable levels.

 

[Andrew4Supra]

I run premium ... typically 93

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