12-06-2020, 06:52 PM Show Senior Member Thread Starter Join Date: Dec 2020 Location: NJ Posts: 344 Gas - regular, mid or premium? The CX-5 is the only car/SUV I have owned where the customer gets a choice on those 3 levels of gas to be used - depending upon the hp desired. On my last few Audi's premium was required. On my wife's
Subaru, suggestion is to use regular. Join Date: May 2013 Location: Virginia Posts: 154 Quote: Originally Posted by bobm The CX-5 is the
only car/SUV I have owned where the customer gets a choice on those 3 levels of gas to be used - depending upon the hp desired. On my last few Audi's premium was required. On my wife's Subaru, suggestion is to use regular. Let me know what you do. For my WRX I use Sunoco 91 octane, I don�t pay for the 94 I was going to do the same for wife�s turbo CX 5 Join Date: Dec 2016 Location: Northern Illinois Posts: 459 Quote: Originally Posted by bobm The CX-5 is the only car/SUV I have owned where the customer gets a choice on those 3 levels of gas to be used - depending upon the hp desired. On my
last few Audi's premium was required. On my wife's Subaru, suggestion is to use regular. With almost any car you have a choice of which octane to use. No one is making you use any particular octane, right? A recommendation is just that, a recommendation. You don't say but I'm assuming that you have a turbo CX-5? If not, you're wasting your time and money messing around with difference octanes. Of course, it's yours to waste if you like... In general the higher the engines compression ratio the greater the need to control preignition (aka knock). This is done with octane, the higher the octane the more control over preignition. Some cars can take advantage of the higher octane to make more power by varying the timing, some can't. In some cars it's a total waste by using higher, and more expensive octane. I use the lowest octane of 87 in my CX-5, that's what Mazda recommends. In my MX-5 Mazda recommends high octane, as the engine has a high compression ratio, and that's what I use. Kawasaki recommends using high octane in my motorcycle because of the high performance/high compression ratio and that's what I use. Some people claim that they can feel the difference by using high octane in a car that doesn't require it. Maybe they do maybe they don't. Is it worth the difference? YMMV 12-07-2020, 08:10 AMJoin Date: Sep 2020 Location: Airdrie Alberta & Maricopa AZ Posts: 82 What does your manual say? 12-07-2020, 08:18 AMSenior Member Thread Starter Join Date: Dec 2020 Location: NJ Posts: 344 Quote: Originally Posted by Conrad 16.5 With almost any car you have a choice of which octane to use. No one is making you use any particular octane, right? A recommendation is just that, a recommendation. You don't say but I'm assuming that you have a turbo CX-5? If not, you're wasting your time and money messing around with difference octanes. Of course, it's yours to waste if you like... In general the higher the engines compression ratio the greater the need to control preignition (aka knock). This is done with octane, the higher the octane the more control over preignition. Some cars can take advantage of the higher octane to make more power by varying the timing, some can't. In some cars it's a total waste by using higher, and more expensive octane. I use the lowest octane of 87 in my CX-5, that's what Mazda recommends. In my MX-5 Mazda recommends high octane, as the engine has a high compression ratio, and that's what I use. Kawasaki recommends using high octane in my motorcycle because of the high performance/high compression ratio and that's what I use. Some people claim that they can feel the difference by using high octane in a car that doesn't require it. Maybe they do maybe they don't. Is it worth the difference? YMMV Thank you! Join Date: May 2020 Location: Central Wisconsin Posts: 254 Quote: Originally Posted by bobm The CX-5 is the only car/SUV I have owned where the customer gets a choice on those 3 levels of gas to be used - depending
upon the hp desired. On my last few Audi's premium was required. On my wife's Subaru, suggestion is to use regular. For most average day to day driving, you'll likely not notice a huge change. My 2� 12-07-2020, 11:58 AMJoin Date: Oct 2018 Location: Northern California Posts: 2,047 I have always hated the terms used for gasoline like mid-grade. LOL I tried 87 octane for testing purposes on my 2.5 MAZDA 3 2018 , all performance levels (DATA LOGGED all the testing) went down! The MPG remained close enough the same as long as it was only me in the car 1/2 tank or full and close to level driving. I did not test with added weight or variable driving conditions. On the DYNO using 87 octane the power dropped out so much I am wondering how MAZDA ever claimed what they advertised? Repeating the DYNO with the DELTA set for the 91 fuel the power levels went back up to close to MAZDAs fairy tail output advertised! Last edited by Callisto; 06-10-2021 at 10:12 AM. 12-07-2020, 01:24 PMSenior Member Thread Starter Join Date: Dec 2020 Location: NJ Posts: 344 Quote: Originally Posted by Dennis Wendt For most average day to day driving, you'll likely not notice a huge change. My 2� Dennis, Actually the dealership filled it with regular - said they ain't allowed to use fill a new car (at least this one anyway) with anything else. Senior Member Thread Starter Join Date: Dec 2020 Location: NJ Posts: 344 I guess some of where my confusion is that Mazda states that for the CX-5 AWD TURO you get: HORSEPOWER WITH 87 OCTANE PREMIUM UNLEADED FUEL 227 HORSEPOWER WITH 93 OCTANE PREMIUM UNLEADED FUEL 250 Join Date: May 2020 Location: Central Wisconsin Posts: 254 Quote: Originally Posted by bobm Dennis, Actually the dealership filled it with regular - said they ain't allowed to use fill a new car (at least this one anyway) with anything else. Hope he didn't hurt your leg when they pulled on it. Does the Mazda CXThe Mazda CX-5 does not require premium gas, but Mazda still recommends using premium 93 octane fuel on models with the turbocharged engine in order to get the best performance.
Does Mazda require premium gas?Do Mazda Cars Need Premium Gas? Car owners often ask us here at Cox Mazda: “Do I have to use premium gas in my Mazda?” For the most part, the answer is no.
What gas does a 2022 Mazda CXFuel with a rating lower than 87 octane (91 RON) will negatively affect the emission control system performance and could also cause engine knocking and serious engine damage. USE ONLY UNLEADED FUEL.
What gas does a 2020 Mazda CX2020 Mazda CX-5 SKYACTIV®-G 2.5L Turbo Engine Specifications
This engine can generate 227 horsepower and 310 pound-feet of torque when powered by 87 octane regular unleaded fuel.
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