View Poll Results: Since gas is going up again.....what grade gas do you put in your C?
Always use regular unleaded
2
2.60%
Always use PLUS unleaded
1
1.30%
Always use PREMIUM unleaded
73
94.81%
Random...different grades at different times
1
1.30%
Voters: 77. You may not vote on this poll
what kinda gas do you put in your C?
10-26-2007, 09:03 AM
#405
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2003 Mercedes C230k Coupe
91 octane. We have high compression motors that need the extra octane figures to avoid pre-detonation. Not only that, the car was designed around a 91/92 octane figure, and the ****tier fuel economy and slight loss of power by running 87 simply isnt worth it, because you go through the gas quicker than you would with 91, in the end costing you more money anyways.
10-26-2007, 05:07 PM
#411
Super Member
i put regular in my my c230k from 2000 to 2007 since the day i got it brand new. i traded it in at 98k miles and it was still running perfect, never had any engine issue. as for my w203? same deal.
10-26-2007, 05:21 PM
#412
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1959 220S / 1979 230 G / 2002 A210 AMG / 2003 C320 SC / 2004.5 C320 SS / 2005 ML350 SE / 2008 smart
find some vintage leaded gas... that will do great stuff to your thread searching abilities !
. . . 
10-27-2007, 11:41 PM
#415
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2003 C230K Sedan
93 also. I was using Hess for a while but I noticed a sign on the pump the last time that said "contains up to 10% ethanol," and I've never seen that before. I went into the store to ask about it and the girl behind the register had no idea what I was talking about. Around that same time I noticed some vibration after startup that would go away... I STFF and found out that others have experienced the same with the E10 gas. I'm on my first tank of Chevron thanks to forum recommendations, but I'm not impressed (yet).
10-27-2007, 11:50 PM
#416
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2002 C230 coupe , NOt THE AVATAR!!
i use Octane 73 BioHydrogenEthanol100%ProaneSolarDiselBatteryE=mc2 McDonaldBurgerKingIn&outWendysJackInTheBox and blah blah blah 
10-28-2007, 12:49 AM
#417
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2003 Mercedes C230k Coupe
10-28-2007, 10:53 AM
#418
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2007 C350 6M
10-29-2007, 01:58 AM
#420
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C230 Kompressor Sport Coupe
i dont use gasoline.
i use a joe cell. a car can keep running off of a joe cell even after the fuel lines been disconnected. just google it, you'll see.
beat THAT fuel milage.
i use a joe cell. a car can keep running off of a joe cell even after the fuel lines been disconnected. just google it, you'll see.
beat THAT fuel milage.
12-05-2007, 02:29 AM
#421
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'05 c230 Kompressor Sport Sedan
i'm a big fan of ARCO gas and use the regular unleaded all the time.
NOT! that's insane! the difference between regular and premium is negligible considering the damage it could cost to the engine.
Have one less Starbucks coffee a week and you're good to go.
NOT! that's insane! the difference between regular and premium is negligible considering the damage it could cost to the engine.
Have one less Starbucks coffee a week and you're good to go.
12-05-2007, 02:49 AM
#422
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2003 C240
In just about a year that I've owned my C240, I would estimate that I've used Hess' 93 Octane about 90% of the time.
My last fill up was at $3.29 gal for 93
My last fill up was at $3.29 gal for 93
12-05-2007, 02:52 AM
#423
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2002 C230 coupe , NOt THE AVATAR!!
the salesmen fill up my 2008 SLK350 with rotten robbie regular unlead just when the car touch the ground...
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01-10-2008, 01:11 PM
#424
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'05 c230 Kompressor Sport Sedan
Gas type comparison by brand
After some research, we'll find that all companies other than Chevron purchase their gas from the same source. The difference in gas is the additives that each company combines into their fuel. All gas,....even Arco meets requirements set by the government. Other companies like Shell claim to exceed requirements by as much as 5x.
TWO QUESTIONS:
1. Is it true that Arco purchases gas from other companies: 76, BP and Chevron, so it's basically the same gas as the big names?
2. What is YOUR personal experience with performance or use of different types of gas by brand?
MY EXPERIENCE:
- With a weak car like the Toyota Rav4, I could tell the difference btw gas types. Arco seemed less responsive. 76 and Chevron a little better. Shell even better. I can't tell the difference between 76 and Chevron at all. But if my parents put Arco into my car (they love it), I can tell that it's not Shell.
- During my many trips in the Rav4 going to and from SF and LA, I tried Chevron vs. Shell and found shell may have given me more gas mileage. I can't really tell b/c there's so many variables that could change that.
- When I had the Rav4, I found that higher octane only burned more quickly and I lost mileage. I went back to regular 87 octane.
- I have never used anything other than Premium Shell V-power in my c230k and don't plan to change unless someone shares something new. Any thoughts?
TWO QUESTIONS:
1. Is it true that Arco purchases gas from other companies: 76, BP and Chevron, so it's basically the same gas as the big names?
2. What is YOUR personal experience with performance or use of different types of gas by brand?
MY EXPERIENCE:
- With a weak car like the Toyota Rav4, I could tell the difference btw gas types. Arco seemed less responsive. 76 and Chevron a little better. Shell even better. I can't tell the difference between 76 and Chevron at all. But if my parents put Arco into my car (they love it), I can tell that it's not Shell.
- During my many trips in the Rav4 going to and from SF and LA, I tried Chevron vs. Shell and found shell may have given me more gas mileage. I can't really tell b/c there's so many variables that could change that.
- When I had the Rav4, I found that higher octane only burned more quickly and I lost mileage. I went back to regular 87 octane.
- I have never used anything other than Premium Shell V-power in my c230k and don't plan to change unless someone shares something new. Any thoughts?
Last edited by zoomie; 01-10-2008 at 01:14 PM.
01-10-2008, 02:07 PM
#425
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a quarter mile at a time
gasoline is usually purchased in bulk from distribution centers. Addatives are added to this base gasoline to make the different types of gas. These addatives do different things and can affect your engine differently.
Your experience with a RAV4 may be different than in your C230. The RAV4 may be tuned for 87 octane gas. Engines tuned for low octane gas are timed very conservatively and may lose performance if higher octane gas is used. Your C230 however is supercharged, meaning it benefits from higher, more stable burning fuel. Knock sensors are used to adjust timing for optimal performance.
Your experience with a RAV4 may be different than in your C230. The RAV4 may be tuned for 87 octane gas. Engines tuned for low octane gas are timed very conservatively and may lose performance if higher octane gas is used. Your C230 however is supercharged, meaning it benefits from higher, more stable burning fuel. Knock sensors are used to adjust timing for optimal performance.
