yet another 1

 

91 octane....

 

I use only 91 octane since my ECU has been reprogrammed.

 

Never too late to switch over; 91.

 

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.

 

93 and nothing lower

 

diced lions

 

93 Octane only Chevron, nothing else!

 

93 from BP. There's another thread, as mentioned before, about this very same subject.

 

oh god how many times has this been asked??? just use 91/93 and stop the gas threads ffs!

 

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.

 

find some vintage leaded gas... that will do great stuff to your thread searching abilities !

 

. . .

 

93 every time.

 

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).

 

i use Octane 73 BioHydrogenEthanol100%ProaneSolarDiselBatteryE=mc2 McDonaldBurgerKingIn&outWendysJackInTheBox and blah blah blah

 

You use it too!?

 

Great to know I am not the only one.

 

93 and only from name brand gas stations...

 

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'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.

 

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

 

the salesmen fill up my 2008 SLK350 with rotten robbie regular unlead just when the car touch the ground...

.................................................. ...........................................

 

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?

 

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.