Automotive

CX9 on Regular Gas

  • Last Updated:
  • Apr 1st, 2017 4:01 pm
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[OP]
Newbie
Dec 3, 2009
69 posts
13 upvotes
Ottawa

CX9 on Regular Gas

Drove the CX9 and love the drive but I don't want to pay an extra 20% for premium unleaded. Any current owners out their who can commented on the fuel efficiency and power when using regular?
52 replies
Deal Addict
Jun 20, 2011
1796 posts
607 upvotes
VANCOUVER
Search is your friend. Search for debates of regular vs premium gas. There are a ton of threads.

Most will say use what is recommended in your manual.
Banned
Oct 10, 2011
505 posts
30 upvotes
Toronto
If your car requires premium unleaded(91) then use 91 don't use 87 or even 89 it's not GOOD for the car. No need to cheap out on the gas, and if you want go fill up 91 from Costco full tank it's usually 13-15 cents cheaper than your regular gas stations.
Member
User avatar
Apr 17, 2015
493 posts
208 upvotes
Toronto, ON
I always find it funny when people have no problem buying expensive vehicles, and then start to pinch pennies at the pump ( what is the difference, like 15 cents?).

But looking at the manual, the CX-9 (at least the 17') calls for 87 octane fuel. Go with what the manual calls for.
Deal Expert
User avatar
Oct 13, 2009
21025 posts
10470 upvotes
Iqaluit, NU
dont.


just dont.
Re: Procurement, Life & RFD
nasa25: say you won it in a raffle. That's what I do with like 86% of my purchases
infinityloop: Lying to your SO seems like an unhealthy long term strategy
nasa25: lmao
Deal Expert
User avatar
Jul 30, 2007
23652 posts
8634 upvotes
Toronto
"Power comes from a turbocharged 2.5-litre SkyActive-G four-cylinder that puts out 227 horsepower on regular 87 octane gas; 250 hp on premium fuel, torque remains the same for both types of fuel"

you can use both. Just matter of your preference, I guess.
Member
Aug 9, 2008
354 posts
147 upvotes
Jimmy96 wrote:
Mar 27th, 2017 1:08 pm
If your car requires premium unleaded(91) then use 91 don't use 87 or even 89 it's not GOOD for the car. No need to cheap out on the gas, and if you want go fill up 91 from Costco full tank it's usually 13-15 cents cheaper than your regular gas stations.
^ This. I usually fill 80 litres when my SUV is empty so this is at least a savings of $10 per fill. it adds up when you fill every other week (in my case)
[OP]
Newbie
Dec 3, 2009
69 posts
13 upvotes
Ottawa
Here's the issue, when you test drive it's always with premium and I was looking for owners feedback about real world on regular. Not many cars come with different published numbers for different octanes. Bit of a unique situation.

20% more at the pumps and it looses it's efficiency advantages over it's competitors. Not being cheap just want to look at the whole picture.
Newbie
Oct 28, 2016
46 posts
13 upvotes
corvax wrote:
Mar 27th, 2017 1:27 pm
^ This. I usually fill 80 litres when my SUV is empty so this is at least a savings of $10 per fill. it adds up when you fill every other week (in my case)
Which adds up to $20 a month and $240 a year? Compare to what ur paying for ur car it's really nothing. Especially if you own the car. But if the manual says regular is fine, go for it.
Newbie
Jan 8, 2017
12 posts
17 upvotes
Not worth it. You will have worse fuel economy with regular gas vs. premium and barely save anything, not to mention the decrease in power.
Member
Aug 9, 2008
354 posts
147 upvotes
runningguyw wrote:
Mar 27th, 2017 1:32 pm
Which adds up to $20 a month and $240 a year? Compare to what ur paying for ur car it's really nothing. Especially if you own the car. But if the manual says regular is fine, go for it.
my point was to stick with premium (as recommended by Mercedes) but go to Costco for cheaper gas .. and hotdog/pop combo Smiling Face With Open Mouth
Deal Addict
Feb 4, 2003
2082 posts
108 upvotes
CX9 required 93 for the 250hp. Review already said it not worth it, the extra HP comes at the high torque end, and you probably won't notice it unless you always redline the car.
Deal Expert
User avatar
Jan 27, 2006
17454 posts
1634 upvotes
Woodbridge
If you don't care for any type of performance whatsoever, then use regular.
"I'll put up color bars before I'll put you in front of our cameras."

- MacKenzie
THE NEWSROOM (HBO)
Deal Fanatic
May 1, 2012
8434 posts
5844 upvotes
Markham
It's a DI engine isn't it? Isn't there chatter that 87 octane causes carbon build up?

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