Is There Actually a Benefit to Putting High Octane Fuel in a Low Octane Engine? • Cars Simplified

I'm probably not the first one to say this, but you look like Nick Frost.

I cant thank you enough!!

My Honda has direct injection so does it make a difference choosing 91 over 87?

My car use 0,1 l less fuel pr 10 km with 98 oct compared to 95. It also run smoother.

I compared 95 vs 100 octane on my lexus ct200h hybrid.
I didnt recocgnize any power benefit, but consumption was from 5% to 10% lower.
I measured it with the actual fuel pumped and kms, several times on the same home/work travels.
Curious thing, the onboard computer gives even lower consumption values, so I'm pretty sure something happens and is recognised by the car, the 100 octane fuel is also different in conposition and smell.

Awesome video . Glad it’s short, simple and to the point . Thank you

I saw a low compression antique engine ruined by running AVGAS through it (avgas was used to allow for better fuel preservation). What ruined the engine? The fuel continued to burn as it was being ejected out the exhaust valves and it wore down the valve seats VERY quickly.

It’s petrol not gas

What about high compression engines that have egr and direct injection? Newer Camry’s have 13:1 compression ratios but the manual still recommends 87 octane? Could the car be smart enough to take advantage of higher octane fuel?

hi, i have a 9.5:1 compression ratio in my motorcycle, is it high or low compression?

I have a low octane car but trust me, it runs much smoother and quieter on higher octane gas 91 and up. It's not in my head, it's remarkable!

Well ....... only if the engine is designed for high octane fuel . otherwise performance will decrease

You are the fist person that answered my question. I have a 2002 Ford excursion V10, it has 160k miles. The owners manual calls for 87 octane but it says that it might ping lightly. I live in AZ so is kinda 🔥 hot .. So I ran multiple time seafoam in the gas tank. The engine still pings at lower rpms. Example: I'm going 45mph and the rpms are at 1200.. I step on the gas and the engine pings until 3rd gear kicks in.. So I have to run 91 octane so I don't get any ping and the truck runs pretty smooth..

Great video.. new subscriber.

This is very interesting. I recently had a misfire code on my number 3 cylinder. I had replaced that injector about 2 years ago an assumed it was that injector. I accidentally put about 5 gals of 90 octane no ethanol regular in my tank. The next day miraculously the misfire was almost completely unnoticeable. So I’m assuming my number 3 cyl fouled out that injector. Then when I ran the 90 octane no ethanol fuel through it, it cleared that cylinder of debris and the injector became unstuck or cleaned out. As my mech told me the injector was intermittently firing. And trust me I noticed when I started it the next morning. Now I’ll clear the codes and see what my scanner tells me.

Regarding a 1999 ford ranger: the manual calls for a 87 octane, however, it pings on acceration. This is a v-6. When using a higher octane, it does not ping, and appears to have a little more power. My 2006 Chevrolet has a V-8 and calls for 87 octane, however, when It burns 91, it appears to have more power. I used to have a 1973 LTD which called for 91 octane. A mechanic told me I could burn 87 octane, as he would retard the timieing , and it would loose a little power. I had this done, but from burning the 87, it would use 1 quart of oil every 1000 miles. When using 91 octane it went the 5000 miles between oil changes, and using no oil between oil changes.

I accidently filled up with 97 gas and I'm watching this video trying to get better about it. Didn't help.

Ok riddle me this! What if I have a very high compression ratio but my car calls for regular gas... such as the Mazda skyactive engine.

87 Octane plus Marvel Mystery Oil on every fill up. Your vehicle will love you for this.

Question, if I have to go long distance constantly above 140 km/h speed for 5 hours, can I use Hugh octane though my car is recommended to use low octane..

Turbocharged Engines= usually needs a higher octane fuel compared to Non Turbo Engines to prevent pre-ignition/pinging

Cars made after 2010 that has a compression ratio of 10:1 or higher would need atleast 93-95 octane gas to prevent pinging/knocking/pre ignition

pre-2010 cars with compression ratios 9.5:1 or lower usually doesn't need high octane gas 🤷‍♂ you can put the absolute cheapest 85-87 octane pump gas and still get 20-35MPG

although if you put a very low octane gas the ECU would squirt a bit more fuel / delay the ignition timing if it detects a knock which could affect the fuel consumption

can using a lower octane cause stalling ?

Could I put 89 in my 2010 Malibu 3.6 ?

My dude you def break it down. Been a while since i read my tuning book and this is def a quick refresher

I’m sorry but when I put 87 gas in my commute car Chevy equinox the gas burn a lot faster compared to when I put premium it’s night and day

In malaysia there is only ron 95,97 and 100

I put high octane gasoline in my 2007 Mazda 6 and it shifts better now. The high octane gas worked much better than the fuel system cleaners. I'll try regular gas next time.

Hi Steve, my name is Steve to! Lol.

Hey, my motorcycle manual says 93 octane or higher. At the place where I live I have options of 91, 97 and 99 Octanes (all sold by different gas stations). I fill 99 because it’s a little cheaper than the 97 ( again different companies). Is it okay for my motorcycle which calls for 93 or higher? (I care a lot for her). Thanks in advance 😊

But if you have a weak spark lower octane may be easier for engine to start

what if it just pings when going up hills ? thanks

So if I have a 2001 chevi s 10 truck with a v6 vortec can I run a Higher octane because it is over 20 years old. Or should I just stay with regular gas

Like my sierra 5.3 2016 after 5 years it's start to knock with 87 some times , and i noticed the engine had to decrease the power due to the engine knock ,
when i put higher octane its run much faster and much smoother in all the situations

Never seen someone answer a question as soon as the video start. For that ill sub

my quastion is does 98 fuel damage tuned scooter 65cc does it damaging parts?

Dosen't 91 Octane have More Detergents in the Gasoline to Clean your Pistons free from Carbon?

I sticking with the high octane gas ⛽️ on my 2008 Prius because it keeps my Catalytic converter clean. If you check how much a original Catalytic Converter cost you will change to 93 octane on your 2008 Prius. Original Catalytic converter for 2008 Prius 1,500 plus another 300 that 1,800.

I’m Sorry but, my 2008 Prius gets more power and gas mileage on 93 octane. Plus my Catalytic converter say clean. Not all cars that run on 87 get this benefit if they switch to 93 octane

2014 si coupe needs 91 grade. I wonder if 93 is good too?

Can high octane help if you're idelling your vehicle a lot more that you'd like.

I read at least 89 octane is better for a luxury car.

Me & friends switched to high octane fuel with great results. An article starting out biased makes one question the author's motive when real world use proves the author's claims inaccurate. By experience higher octane fuel has provided better performance & higher mpg for all of us making the switch. If not, why would any of us pay the dollar more per gallon?

Flash tune for higher octane is the real way to benefit from higher octane..it does ignite better and burns cleaner..for that I always ran high grade in my simple vortex 4.8..it hated lower oct..spoiled the dang thang..but when a friend of mine played around with a palm tuner..nothing professional just enough to flash for fuel grade..and man o man.. nothing but a stock motor..no power parts at all.. and the truck preformed amazing.. averageing 30+ mpg..and the higher end of the revs and it jumped up and was gone..and made it the lower end of the revs way more torque..played with shift points alittle and bam..a fun little truck out on the back roads..no stranger to getting ya off the line going through town..higher octane does help most vehicles..but a tune changes the game even if it's stock.. got the proof out in the driveway.

Came to malaysia, the lowest octane in our country is ron95😁

What if my car needs 87 octane but there is only 86 octane available here?there is 86,88,91 here which should I use

Whether premium gas gives you any benefit is dependent on whether the engine is designed to adjust ignition timing with enough latitude to make the best of whatever octane it gets. Some vehicles are relatively stupid and you don't get much benefit from premium; some vehicles have a lot more latitude in their ignition timing automatic adjustments and you get a benefit. The only way to know is to run several tanks and see.

Well made video but my question is ...why They don't use 95 octane fuel in the US? Here in Italy we use 95 and 98 and sometimes 100 octane fuel

For what its worth cars are different from one another. My uncles volvo would only run on a mix of regular and high test, he used to literally put in half and half at the pumps. I ran high octance 93 through it and when I turned it off it ran on like you would not believe, chug chug chug for like 20 seconds. Our 97 Plymouth Neon non-turbo 2.0 loved the medium grade stuff, we tried low, high and medium and it just purred on medium. I think a lot of it has to do with the 02 sensor and the computer chip interpreting things. Science behind my observations? No. But this is what I experienced. Oh and that old Neon, we ran that up to 250K miles! not km, miles. Should have beenn in the Smithsonian - Ha!

Yes putting it simply because of carbon built up

Straight to the point perfect I own a Mercedes and decided to put cheap gas and started to here a kick at high accelerations just use what the manufacturer says period on high end cars🙌👌👍