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As all of you know, gas prices are getting ridiculous! I wanted to see if any one out there uses 87 octane on there 300C? I was reading the owners manual and it recommends 89.

I also have a Chevy Tahoe with a 5.3L and it only requires 87. I know the long term uses of a higher octane would be more beneficial, but will I be harming the engine if I use 87 until the gas prices level out?

Thanks for your help...

-MC
 

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octane

mcmac64 said:
As all of you know, gas prices are getting ridiculous! I wanted to see if any one out there uses 87 octane on there 300C? I was reading the owners manual and it recommends 89.

I also have a Chevy Tahoe with a 5.3L and it only requires 87. I know the long term uses of a higher octane would be more beneficial, but will I be harming the engine if I use 87 until the gas prices level out?

Thanks for your help...

-MC
try filling with 89 Octane & when down to 1/2 tank go to 87, then alternate from there. There should be no appreciable problems.
 

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It saves you like $2 per fill up (assuming you take your tank totally dry, which is never a good idea unless you like replacing fuel pumps), what's the point?
 

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Discussion Starter #4
charlie D said:
try filling with 89 Octane & when down to 1/2 tank go to 87, then alternate from there. There should be no appreciable problems.
Great idea...thanks
 

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Discussion Starter #5
marlinspike said:
It saves you like $2 per fill up (assuming you take your tank totally dry, which is never a good idea unless you like replacing fuel pumps), what's the point?
Point taken...i am not sure why i am trippin.
 

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trippin

mcmac64 said:
Point taken...i am not sure why i am trippin.

Chill & enjoy !!!!! :banana: :banana: :AR15firin :AR15firin :AR15firin :banana: :banana: If you are like the rest of us, you got the " BEAST" in order to enjoy.So, in short , enjoy.
 

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MDS is designed to work on

89. You would get better mileage and no decrease in performance by sticking with that. Might be a $ 4.00 difference in the tankfull
 

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<shaking head>

Follow your owners manual.

I could (and have in the past) gone into a whole diatribe about the precision engineering that goes into all of the systems on today's cars and how futzing with the specifications alters tha parameters under which that system is designed and intended to operation, with possible cascading effects on the other systems with which the system in question interfaces.

But in the interest of keeping my blood pressue under control and saving a few zillion cyber-bytes from flying through cyberspace, I'll just leave it at that - follow the recommendations in your owners manual.
 

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I'm just happy to find ANY kind of gasoline these days. Are you guys seeing the shortages we are in Tampa? Most stations are out of gas and those that have some only have it for a few hours, it's getting a little scary.

I'm actually considering riding the motorcycle a few days a week for a bit, cause we are all runnning low here.

I'm sure not complaining though, I have AC, electricity and my feet are on dry land. I've never felt luckier or worried less in my life.
 

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I've been running 87 for about a month now and have actually seen an increase in my MPG driving to and from work and around town. I have not seen a decrease in power either. Just one persons observation. I tried 87 last winter for a tank, I thought I did see a performance decrease. Maybe the heat and humidity here in FL is condusive for 87. Anyways, I'll be running 87 until gas prices stabilize, then try 89 again to see if I see a difference.
 

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300sea said:
I'm just happy to find ANY kind of gasoline these days. Are you guys seeing the shortages we are in Tampa? Most stations are out of gas and those that have some only have it for a few hours, it's getting a little scary.
I'm actually considering riding the motorcycle a few days a week for a bit, cause we are all runnning low here.

I'm sure not complaining though, I have AC, electricity and my feet are on dry land. I've never felt luckier or worried less in my life.
Thank God for that too..Those that weren't immediately affected by the hurricane are fortunate..but rising costs of other things will affect us all. Gas is only the beginning I feel.
 

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Two stations in my area only increase price by $.05 per grade not the usual dime. To get 17 gallons for only a nickle more/gallon costs an extra $.85, same point was made in a previous post. I use 89 only. In the leased Bimmer I used 87 with no difference in mpg or performance.
 

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mcmac64 said:
As all of you know, gas prices are getting ridiculous! I wanted to see if any one out there uses 87 octane on there 300C? I was reading the owners manual and it recommends 89.

I also have a Chevy Tahoe with a 5.3L and it only requires 87. I know the long term uses of a higher octane would be more beneficial, but will I be harming the engine if I use 87 until the gas prices level out?

Thanks for your help...

-MC
I've had my C since last November, and have only used 87 octane and it runs great .............
 
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