which company gas works better for Mazda Cx5
- Thread starter sangs
- Start date
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- Plano, Texas, USA
I use Shell regular gas all the time and haven't tried any other brand of gas for our CX-5. But I do notice our BMW 528i could get 3 more mpg on the long highway trip when I use Shell 93-octane than Chevron 93-octane, a significant improvement!
I believe we should use top-tier gas all the time. Costco is but Sam-Club is not.
caverunner17
Member
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- 2014 6MT Sport
Brand of gas does not matter. Most of the times, it all comes from the same distribution plant in your region.
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- RDX Aspec Adv.
This, unless it was over multiple tanks compared to multiple tanks.
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- Plano, Texas, USA
Although different brand of gas may come from the same refinery, but the detergent pack from different brands added before the gas gets shipped into gas stations is different. That's why there's a list of top tier detergent gasoline.
Condition of the gas station's tanks (and level they're at when you fill up) can make a difference also... especially margin of errors like 1mpg... the tank can have water in it, sediment, old gas...
C
CX5_Pete
I had a similar discussion with a co-worker awhile ago and he brought this up to me:
If the gasoline has more additives and detergent in it, wouldn't it get less gas mileage since there is less gasoline per volume?
If the gasoline has more additives and detergent in it, wouldn't it get less gas mileage since there is less gasoline per volume?
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- Plano, Texas, USA
Very true! That's why I've always been trying to use newer gas stations hopping their underground tank is in better shape and their pump is more accurate.
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- Plano, Texas, USA
I'd not worry about that as those detergent pack counts very minimum percentage of the gasoline in volume. Besides, the effectiveness of the detergent sometimes is not only by volume, but the material they used, many are patented. I'd more worry about the 10% or 15% content of ethanol in our gasoline, which greatly affects our gas mileage but the effectiveness of cleaning the air is still debatable.
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- RDX Aspec Adv.
I've never seen it do anything to harm mileage. As an experiment, I'll fill up with ethanol free gas for the next few tanks and keep the forum posted. I routinely get 22.5 to 23.5 mpg, so if it deviates significantly for two tanks, I'll consider it legit.
I try to use Shell and Chevron w/techron. Temps reached the 111-114 degree mark over the weekend here. Used 90 octane as some had suggested for hot weather. Saw no difference which is probably a good thing considering folks proposed skyactiv engines pull timing under heavy load conditions.
Another thing people should keep in mind when comparing mileage between vehicles (and from tank to tank) is the average speed readout. I haven't changed the average speed - IOW, it's now the average for all ~30,000 kms driven on the vehicle, and it sits at 40 kph (24.8 mph).
My CX-5 has a lifetime readout of 9.9 litres per 100 KM (23.76 mpg) at an average speed of 40 kph (24.8 mph).
My CX-5 has a lifetime readout of 9.9 litres per 100 KM (23.76 mpg) at an average speed of 40 kph (24.8 mph).
Thank you for that list. Good to know that Costco is in the list along with other major companies.
I will refill full tank once the tank is almost empty and then will see whether Shell gives better results.
so what is the best average speed that gives better economy mileage ?
I think it is not average to be considered. because if u drive at 20 mph and then 60 mph the average becomes 40mph. What I read somewhere that if we drive at 50mph constant speed ( may be on highway ) , u get better economy gas mileage
It's at best a 3% difference between E0 and E10.
E10 has UP to 10% ethanol, and it may legally contain less (but not more), so you never know exactly how much ethanol you're getting.
At best, instead of 25MPG on E10 you would get 25.75.
It's impossible to see such a small change in MPG outside of a good controlled experiment.
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- Plano, Texas, USA
I'd say E10 "at least" has 3% impact on gas mileage according to EPA. Many people, especially with older vehicles, typically experienced 6~10% drop or even more on gas mileage. Unfortunately I can't test it on our CX-5 as the ethanol-free gas is nowhere can be found in our area.
