hcy

I would like to know what octane of gas runs best on a c63? SUNOCO or SHELL
94 SUNOCO or 91SHELL

impr

I always use chevron 94 octane for my cars. When my c63 arrives at the end of the month I intend to use chevron 94 still :p

I try to stay away from shell after their whole fuel/water fiasco back in the day. Also in the past (not sure about now) but Shell/Esso's gasoline was found to be the most impure out of all the competitors. I don't have a link to quote that so you can just take it as conjecture .

edit: I guess you're in toronto do they have Chevron over there? Not sure about Sunoco as I've never seen one in Vancouver.

mrtesting

Every Canadian with a high performance car would tell you Sunoco 94. In fact the C63's fuel cap reads: "Minimum 93" so.. go figure!

Trust me.. I am there almost everyday, so hopefully I will see you around!

Untertürkheim

I believe Esso is Exxon-Mobil, which I do not like.

Shell and Chevron are both excellent, but considering the 63 being so high-strung, the extra octane protection would be well worth it to me.

1st amg

I use Sunoco 94 Ultra....only, i have scoped and found every Sunoco gas station in the Ottawa/Hull area....The one by my house is homebase and buddy who works there knows me by name now....he also persaudes me every now and then "open it up when you leave please", of course I oblige with a big

hcy

but a frd of mine who drives a cls 63 said putting ultra 94 is not gd for our engines. Since sunoco's ultra 94 contain ethanol. What he said was shell's 91 is just pure gasoline and he said you will notice the difference if you empty a whole tank and put shell 91 in it. He said it will be gd to put sunoco once a month because ethanol cleans your engine. If you have been putting sunoco u must have realize the muffler tips is black because it's the ethanol that is not burning.

hcy

but a frd of mine who drives a cls 63 said putting ultra 94 is not gd for our NA engines, he said it will be gd for turbo,kompressor or supercharge. Since sunoco's ultra 94 contains ethanol. What he said was shell's 91 is just pure gasoline and he said you will notice the difference if you empty a whole tank and put shell 91 in it. He said it will be gd to put sunoco once a month because ethanol cleans your engine. If you have been putting sunoco u must have realize the muffler tips is black because it's the ethanol that is not burning.

NORTH 44 C63

Sunoco 94 only

sleewell

91 is the best we can get around here. there is a chevron by my house that i usually go to.

mrtesting

To my knowledge.. the higher the octane the higher the levels of alcohol in the benzine (Gasoline), and it is also a known fact that Ethanol helps keep a much cleaner environment. With cars like ours, it is a good motive to reassure ourselves of the fact that we are not that careless about our environment after all.

Whenever I fill her up, I cannot resist to push the pedal down and make her roar and rip through the streets.. and of course burn all that ethanol that is NOT harmful for the air and atmosphere.

Untertürkheim

Sorry, this is not true. Benzine is a ring-form hydrocarbon molecule, and can be made into an alcohol, but this does not determine the octane.

Ethanol is a joke, and it is bad for engines, it is not a solution to anything except corn farmers' bank accounts.

mrtesting

Word?

hcy

so what you guys have sumed up is, gas without ethanol is better.

dlbello

Sunoco 94 for Life.... and I own No stock : > (((((((

All my sports cars ran the best!

mrtesting

Well look at it this way.. what is the closest octane to that of race fuel which is available to the non race driving public..? 94 would be the answer.