Octane 94 Vs 91 for CLS63 AMG
Thread Starter
Member
Joined: Apr 2015
Posts: 99
Likes: 0
From: Toronto, Canada
2016 CLS63s AMG
Octane 94 Vs 91 for CLS63 AMG
Hey guys,
my car gas tank lid has a tag for fuel type says 93 min.
Now in Ontario, Canada the premium gas is 91. where only Petro Canada offers 94 (ultra). however, its a bit far from my house to go there.
so I was wondering if it's OK to fill 91 instead. and would this affect the engine life span? can anyone shed some light on the difference of 91 vs 93 use. how is this used in the car? how does it affect the combustion?
Note that gas price is not my concern as much as the convenience of having a close gas station.
Thanks
my car gas tank lid has a tag for fuel type says 93 min.
Now in Ontario, Canada the premium gas is 91. where only Petro Canada offers 94 (ultra). however, its a bit far from my house to go there.
so I was wondering if it's OK to fill 91 instead. and would this affect the engine life span? can anyone shed some light on the difference of 91 vs 93 use. how is this used in the car? how does it affect the combustion?
Note that gas price is not my concern as much as the convenience of having a close gas station.
Thanks
Senior Member
Joined: Jan 2007
Posts: 309
Likes: 6
From: Central Pennsylvania
1994 S420 RIP (2/8/13), 06 CLS55, 02 ML55, 94 TT Supra, 89 Maserati 228, 911 Porsche Carerra
If my memory serves me the higher the octane the higher the mixture can be compressed ( by the piston) before ignition. In the old days of 105 octane use there wasn't a car that would preignite regardless of compression. You say a bit far but how far is your call. Is it far enough that you would take the chance of doing engine damage rather than going for it. In the USA 91 is mid grade and 92 is hi octane. I use the ultra 93 octane whenever possible ( which is all the time locally) because it is the highest pump grade available. The problem is the ethanol that goes into it as well. It doesn't burn as clean and is designed to supplement and deter preignition. The answer is not ethanol it's adding lead like the old days. IMHO. Good luck.
Thread Starter
Member
Joined: Apr 2015
Posts: 99
Likes: 0
From: Toronto, Canada
2016 CLS63s AMG
Well, Petro Canada is 10mins drive from my house and their washing station sucks! Vs. Shell is at the corner of my neighborhood (1min drive), and their washing station is way better plus AirMile reward program.
However, if using 91 will eventually damage the engine, then I rather drive the 10 mins and wash the car somewhere else.
Thanks for the advise bro
However, if using 91 will eventually damage the engine, then I rather drive the 10 mins and wash the car somewhere else.
Thanks for the advise bro
Newbie
Joined: May 2015
Posts: 11
Likes: 0
From: Richmond Hill, ON
2012 Mercedes-Benz C63 AMG
Hey guys,
my car gas tank lid has a tag for fuel type says 93 min.
Now in Ontario, Canada the premium gas is 91. where only Petro Canada offers 94 (ultra). however, its a bit far from my house to go there.
so I was wondering if it's OK to fill 91 instead. and would this affect the engine life span? can anyone shed some light on the difference of 91 vs 93 use. how is this used in the car? how does it affect the combustion?
Note that gas price is not my concern as much as the convenience of having a close gas station.
Thanks
my car gas tank lid has a tag for fuel type says 93 min.
Now in Ontario, Canada the premium gas is 91. where only Petro Canada offers 94 (ultra). however, its a bit far from my house to go there.
so I was wondering if it's OK to fill 91 instead. and would this affect the engine life span? can anyone shed some light on the difference of 91 vs 93 use. how is this used in the car? how does it affect the combustion?
Note that gas price is not my concern as much as the convenience of having a close gas station.
Thanks
Thread Starter
Member
Joined: Apr 2015
Posts: 99
Likes: 0
From: Toronto, Canada
2016 CLS63s AMG
Well, if your friend is filling less than Octane 91 then the engine will be damaged regardless which station he filled from.
I don't think I would take the chance of damaging my engine if AMG said minimum 93 then I wont screw with it.
Thanks for the feedback though.
I don't think I would take the chance of damaging my engine if AMG said minimum 93 then I wont screw with it.
Thanks for the feedback though.
Newbie
Joined: May 2015
Posts: 11
Likes: 0
From: Richmond Hill, ON
2012 Mercedes-Benz C63 AMG
Well as I mention I use Shell V power for past 5 years and never had any issues. Good luck!
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Thread Starter
Member
Joined: Apr 2015
Posts: 99
Likes: 0
From: Toronto, Canada
2016 CLS63s AMG
So as of Wikipedia, Canada and most of US states use AKI rating system.
Which means petro Canada 94 is higher than Shell 91.
Therefore, I'll be sticking to petro Canada and will not take the chance and cause knocking issues with my M156.
http://en.m.wikipedia.org/wiki/Octane_rating
Thanks all for the feedback
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