High on Octane.. 87 89 91 93
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S600
He underestimates how the driver can influence the octane requirement.
Drive like "the grandma" and you don't need premium.
Drive like the "little old lady from Pasadena" and you do.
I get by with mid-grade gasoline in my S-600 and get 24.5-25 MPG on the interstates at 75 MPH.
Drive like "the grandma" and you don't need premium.
Drive like the "little old lady from Pasadena" and you do.
I get by with mid-grade gasoline in my S-600 and get 24.5-25 MPG on the interstates at 75 MPH.
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From: Colorado
2004 W240 Maybach 57
Altitude (oxygen concentration) is also a factor. We're above 5,000 feet, and our options are 85, 87 and 91. I use 91 in "premium required" vehicles and 85 in "regular required" vehicles.
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18 AMG GTC and 22 F150 Limited. Past owner 16 Maybach, 17 Brabus Smartcar, 06 Ford E150, and 22 G70
modern engines have knock sensors that will automatically adjusting timing for lower octane fuel at the expense of some power. If your on a road trip putting along on hwy you only need 87 but it you like pushing the go pedal then the hi test is your fuel.
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From: New Orleans Area
2015 E400 Sedan
Run what the gas cap tells ya and your engine will thank you.
IF you run less octane then required yoru car will retard timing and hence like said above less power.
Does no one remember PINGING and engines would continue to run when turned off back in 70's??
Use the correct fuel... and oil and other fluids...
why go cheap when you are leasing or buying or own and expensive car...
And who is the guy in the UTUBE? too many people trust everything written or played on the internet
INCLUDING this post!
IF you run less octane then required yoru car will retard timing and hence like said above less power.
Does no one remember PINGING and engines would continue to run when turned off back in 70's??
Use the correct fuel... and oil and other fluids...
why go cheap when you are leasing or buying or own and expensive car...
And who is the guy in the UTUBE? too many people trust everything written or played on the internet
INCLUDING this post!
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S600
Besides, only carburetor based cars would "diesel" FI cars can simply quit spraying fuel (carbs cannot.)
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2015 S550, 2017 GLS450
Your ECU will adjust for lower octane gas at the expense of power. Modern cars won’t let your engine knock too much. If you really want to cause damage, buy cheap gas which is not labeled “Top Tier” and see crud deposit everywhere over time as you try to save 15 cents a gallon at a no name gasoline station.
The best thing you can do for your car aside from meticulous maintenance is to use Top Tier gasoline with goodie detergents and additives that keep your car’s innards clean and healthy.
The best thing you can do for your car aside from meticulous maintenance is to use Top Tier gasoline with goodie detergents and additives that keep your car’s innards clean and healthy.
Last edited by bkdc; Feb 3, 2020 at 11:57 PM.
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2014 S550 AMG, 2017 XT5
Memories.... Had a car on the block that would run for about 15 min after shutting it off, owner got a kick out of it.
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2019 S560, 2015 Honda Civic Hybrid
I was surprised to find out several years ago that every drop of gasoline sold in Austin comes from a single refinery in Corpus Christi. There are two grades supplied, regular and premium, and the mid-range fuel is created by pumping a 50/50 blend at the pump.
Where I live the only difference between brands is the additives. When a truck fills up, they add in the Shell, Exxon, Chevron, etc additives and then deliver to the stations. But the gas itself is the same wherever you buy it.
It makes perfect sense since no one could justify the cost of building a second/competitive gasoline pipeline and terminal and transporting refined product over a distance to a city this size would be impossibly costly by truck or rail car.
Where I live the only difference between brands is the additives. When a truck fills up, they add in the Shell, Exxon, Chevron, etc additives and then deliver to the stations. But the gas itself is the same wherever you buy it.
It makes perfect sense since no one could justify the cost of building a second/competitive gasoline pipeline and terminal and transporting refined product over a distance to a city this size would be impossibly costly by truck or rail car.
Last edited by Tom in Austin; Mar 30, 2020 at 12:31 PM.
Thread Starter
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2014 S550 AMG, 2017 XT5
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2019 S560, 2015 Honda Civic Hybrid
Hey, speaking of gas ... just filled up my wife's Honda ... they had regular for $1.69 and premium was $2.93. Is that price gouging? Never seen such a large differential ...
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From: Birmingham, AL
2019 S560, 2022 Audi S8
Yes it is IMO. Our regular here is also around $1.70 and premium is around $1.40. Just filled my car up and the premium was $1.39.
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From: Santa Barbara, CA
S550C4, Porsche Cayenne
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From: Venice Florida
2018 S560
They are gouging up north with all grades, most stations are still like around 2.39 for Regular unleaded. Pathetic. I always run premium in my car though because I do drive fairly aggressive and I like to have the extra power on tap. Not sure who is making all the money up North here either the wholesalers or the retailers, I have the feeling the retailers. They gotta be making like 60 cents a gallon right now. Normally it's around 8 to 25 cents a gallon.
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'25 S63 AMG E Performance, '26 CLE 53 AMG
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From: Florida
Too many german broads
Why would you want to run 87 in a twin turbo motor? You should just sell your car if you can't afford the proper gas. Nobody here would run 87 in a W222.
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From: Florida
18 AMG GTC and 22 F150 Limited. Past owner 16 Maybach, 17 Brabus Smartcar, 06 Ford E150, and 22 G70
All new cars have knock sensors and will adjust timing to not have detonation in the engine. When your driving down the freeway you consume no more than 50hp to go 70mph. So if you go on a long hwy trip it will not hurt your car to use 87 octane which has more energy content than 93 or 89 fuel. You simply won’t have full power available since the computer not let detonation take place running on lower fuel.
So I do beg the differ on using lower test gas for long road trips. Assuming the owner UNDERSTANDS. It’s not really being Cheap as much as understanding the engineering in today’s cars. Of course the manufacturer says to always use high test. They know there’s too many people that would complain if they didn’t say use it all the time.
i use the high test nearly all the time except for long road trips.
So I do beg the differ on using lower test gas for long road trips. Assuming the owner UNDERSTANDS. It’s not really being Cheap as much as understanding the engineering in today’s cars. Of course the manufacturer says to always use high test. They know there’s too many people that would complain if they didn’t say use it all the time.
i use the high test nearly all the time except for long road trips.
Last edited by Katie22; Apr 10, 2020 at 11:21 AM.
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E55
So how do you accelerate to get on the highway and pass cars? Yes, the computer can adjust but the idea is to have the gas that has an octane rating that the cars needs for normal road use which is cruising, accelerating and dealing with different temperatures.. Besides some crazy self fulfilling desire why would you do it? Your driving a $200k car and your going to even think about the gas cost? 50hp? Your water pump, alternator, smog, etc equipment probably take that at least 1/2 that power.
Knock sensors are not instant adjust so you can cause damages if its done regularly. Lugging your 400hp engine around being held back is not good for your engine. Again, why? It isn't a 1980's car with a simple knock sensor. Your car is also designed to run at a certain temperature which also requires a higher octane gas.
A S550 is not a luxury large engine it is a high performance twin turbo engine why would u do anything to hamper its performance?
WHY?
Knock sensors are not instant adjust so you can cause damages if its done regularly. Lugging your 400hp engine around being held back is not good for your engine. Again, why? It isn't a 1980's car with a simple knock sensor. Your car is also designed to run at a certain temperature which also requires a higher octane gas.
A S550 is not a luxury large engine it is a high performance twin turbo engine why would u do anything to hamper its performance?
WHY?
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From: Florida
18 AMG GTC and 22 F150 Limited. Past owner 16 Maybach, 17 Brabus Smartcar, 06 Ford E150, and 22 G70
Going on a hwy road trip I would not be using 525hp that my engine has to offer even when getting on the freeway. More like 150 to accelerate and 50 to cruise at 70mph. 89 fuel under these circumstances is not going to cause detonation that the computer can’t compensate for. I would challenge a Mercedes engineer to prove me wrong.
now driving around town or spirited driving oh yes 93 all the way.
now driving around town or spirited driving oh yes 93 all the way.
Last edited by Katie22; Apr 10, 2020 at 09:33 PM.
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E55
Google quench and compression and you will see why rpm to hp relation is not what determines detonation, Your engines hpt/tq numbers are higher than 50 at idle so even if using your flawed logic does that occur? At what RPM are you making 50hp? 50? You make more TQ at lower RPMS vs higher. So you think at approx 2000RPM your engine is making 50hp? Heat? Load?
Your engine has to detonate for the computer to sense and make adjustments.
WHY? It takes the exact effort to put the higher vs lower octane in the car so WHY? Put the correct gas in and just drive the car its so easy. If this was a Prius forum it would make sense to state milage concerns.
Your engine has to detonate for the computer to sense and make adjustments.
WHY? It takes the exact effort to put the higher vs lower octane in the car so WHY? Put the correct gas in and just drive the car its so easy. If this was a Prius forum it would make sense to state milage concerns.
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From: Florida
18 AMG GTC and 22 F150 Limited. Past owner 16 Maybach, 17 Brabus Smartcar, 06 Ford E150, and 22 G70
- Well since you don’t agree perhaps you can find a publication from Mercedes that says running 87 on the hwy is going to cause damage to my engine? Please
- Oh and airplanes have for many years and even some cars had anti detonation fluid that would be used when the engine was under heavy power load but at normal power loads no. So again why cruising down the hwy at 70 am I likely to experience detonation under low power requirements in an engine with a 9.0 to 1 compression ratio.
Last edited by Katie22; Apr 11, 2020 at 02:06 PM.
