Last post on Apr 27, 2013 at 8:56 PM
You are in the Mazda CX-5
What is this discussion about?
Mazda CX-5, SUV
#283 of 404 Re: CX-5 questions [m6user]
Jun 22, 2012 (8:13 pm)
I appreciate you taking the time to send me link on which you found a discussion on premium gas use in tne CX-5. This new technology with the high compression and regular gas or in some cases (14.1 compression) with premium gas I believe goes outside the normal discussion of using regular or premium fuel. The owner's manual itself states 87 octane or above which allows for multiple octane useage. The first time I have seen this specification. Also, I believe Mazda probably knows exactly what each octane rating can bring to the table for each compression point. Probably in time this data will be presented to the public. I believe this engine might be different beast when it comes to the typical octane influence. However no matter what octane I use, I really enjoy driving this beast. Later dude.
#285 of 404 Re: Towing? [smashek]
Jul 03, 2012 (9:50 pm)
I'm also deciding between an Impreza Sport Ltd and CX-5 Grand Touring. And both cars are selling like crazy. Which one did you buy, if you have already done so?
#286 of 404 Re: Towing? [fredinhbgpa]
Jul 03, 2012 (10:11 pm)
I went thru the same choice back in March. I ended up with a CX-5 Touring AWD. I love it. I have 5,000 miles and so far my mpg is 29.6. It has a better ride height and is much quieter than the Impreza. It is worth the extra money.
#287 of 404 13 compression
Jul 04, 2012 (11:54 am)
Does anyone know how they managed to put 13.0 compression ratio and run on 87 octane.
I have set up fuel and timing maps on cars and 13.0 is alot of compression and likely to detonate on 87 octane. Granted they are only getting 155 HP out of this.
I would think they have to run less timing advance. I don't know too much about the skyactiv but hard to buy into it.. the engine life maybe reduced?
#288 of 404 Re: 13 compression [fastgst]
Jul 04, 2012 (12:28 pm)
Specially designed piston heads and a more freely-flowing exhaust header.
#289 of 404 Re: Towing? [fredinhbgpa]
Jul 04, 2012 (2:19 pm)
I put down a deposit on a CX-5 touring model that is already scheduled to be built, so hopefully it will arrive a bit quicker than putting in an order for a custom-built model. It will be the AWD & AT model. The dealer has agreed to install a (non-Mazda) Class III trailer hitch, after I had a long talk with the Parts Department manager and convinced him that I understand and will fully comply with the 2000 lb towing limit of the vehicle. I want the Class III hitch (2" receiver) because I already own a bunch of accessories that fit that size hitch. I had been occasionally towing a 4x8 foot U-haul trailer but will probably buy a smaller trailer so I don't need to spend roughly $500 per year for a round trip between MN and TX and back. The trailer I'm looking at could hypothetically carry 2200 lbs, but I have no intention of ever loading it with anything close to 2000 lbs, so there should be no problems with damaging the CX-5 by overloading it. I realize that MPG will suffer with the weight and wind resistance of a trailer, but keeping the trailer small and lightly loaded (and the fact that it is mainly a twice-a-year trip) will keep the overall impact on my gasoline consumption small. Of course, acceleration will also be affected, so lots of extra care in entering/leaving interstate highways, merging and passing will all be required. But I plan to be very careful with my new baby once it arrives!
#290 of 404 Re: - [dudleyr]
Jul 04, 2012 (2:28 pm)
Here in Colorado the 87 octane will not really be beneficial due to the elevation. Purely a waste of money.
#291 of 404 Re: 13 compression [fastgst]
Jul 04, 2012 (3:33 pm)
Direct injection is the main trick to allow the high compression, but other things help. Valve timing, knock sensors, fast acting ECUs, cooling jackets in the right spots and, apparently, a tuned header to help evacuate heat.
#292 of 404 Re: Towing? [johnpt]
Jul 05, 2012 (10:52 am)
I thought the engine is struggling to tow it's own body weight already
I imagine mountain passes and over elevation of 4-5000 ft the vehicle might have an VERY tough time.
Get a roof rack instead?
That said, didn't know CX5 has a 2000 lb limit, the new Acura RDX has 273HP and only rated for 1500 lbs. I think it has to do more with the towing hitch being light duty and it's attachment points than the engine.