In Europe the Skyactiv Gas engines are 14:1 compression.
DI engines: ethanol fuel better?
- Thread starter Benzadmiral
- Start date
- Status
In my neck of the woods premium is 20 cents a gallon more than regular, unless you go to one of the gouging stations which can be 50 cents a gallon more, or worse.
@ 20 cents a gallon more it only takes a slight improvement (1 or 2 MPG) to make the difference and save money. We're talking $3.79 VS $3.99 or something like that.
@ 20 cents a gallon more it only takes a slight improvement (1 or 2 MPG) to make the difference and save money. We're talking $3.79 VS $3.99 or something like that.
Originally Posted By: accent2012
Originally Posted By: Miller88
The Mazda is 13:1 and it recommends 87 too. I think the Mazdas are the only ones with the extreme compression.
That is extreme and definitely explains the "high temp heat to prevent build up" theory. I guess I will give 93 octane a shot... heck even fill up at a shell station, they are supposed to have the best high octane gasoline. BP gas is what I mainly use since that is now considered top tier but I guess I'll spoil myself
.
BP ultimate is every bit as good if not better than Shell. I think one test showed BP had a bit higher detergent levels in their 93 than Shell did. I think both advertise 5x above the federal minimum and TT only requires something like 2.5x the federal minimum. Not all TT gas is the same.
Originally Posted By: Miller88
The Mazda is 13:1 and it recommends 87 too. I think the Mazdas are the only ones with the extreme compression.
That is extreme and definitely explains the "high temp heat to prevent build up" theory. I guess I will give 93 octane a shot... heck even fill up at a shell station, they are supposed to have the best high octane gasoline. BP gas is what I mainly use since that is now considered top tier but I guess I'll spoil myself
BP ultimate is every bit as good if not better than Shell. I think one test showed BP had a bit higher detergent levels in their 93 than Shell did. I think both advertise 5x above the federal minimum and TT only requires something like 2.5x the federal minimum. Not all TT gas is the same.
Originally Posted By: Miller88
In Europe the Skyactiv Gas engines are 14:1 compression.
Elsewhere in the world Mazda requires premium fuel for Skyactiv-G engines. The compression ratio is lower for the U.S. market due to Mazda thinking that people buying an economy car would not want to pay for premium fuel.
I do not believe there are benefits in using higher octane fuel in the Skyactiv. I know that I have dissenters for that opinion.
In Europe the Skyactiv Gas engines are 14:1 compression.
Elsewhere in the world Mazda requires premium fuel for Skyactiv-G engines. The compression ratio is lower for the U.S. market due to Mazda thinking that people buying an economy car would not want to pay for premium fuel.
I do not believe there are benefits in using higher octane fuel in the Skyactiv. I know that I have dissenters for that opinion.
Originally Posted By: DBMaster
Originally Posted By: Miller88
In Europe the Skyactiv Gas engines are 14:1 compression.
Elsewhere in the world Mazda requires premium fuel for Skyactiv-G engines. The compression ratio is lower for the U.S. market due to Mazda thinking that people buying an economy car would not want to pay for premium fuel.
I do not believe there are benefits in using higher octane fuel in the Skyactiv. I know that I have dissenters for that opinion.
There are definitely measurable benefits both on the Dyno and in MPGs but whether that is worth the $ varies.
Originally Posted By: Miller88
In Europe the Skyactiv Gas engines are 14:1 compression.
Elsewhere in the world Mazda requires premium fuel for Skyactiv-G engines. The compression ratio is lower for the U.S. market due to Mazda thinking that people buying an economy car would not want to pay for premium fuel.
I do not believe there are benefits in using higher octane fuel in the Skyactiv. I know that I have dissenters for that opinion.
There are definitely measurable benefits both on the Dyno and in MPGs but whether that is worth the $ varies.
I did try a couple of tankfuls of premium (no ethanol-free stuff available here). The mpg's did increase a tiny bit (per the dash display), but not enough to cause a reduction in cost equivalent to the 40 cent difference in price.
I am not enough of an anorak to mess with UOA. I have driven every car I've every owned longer than I probably should have and none have ever experienced a failure related to lubrication. I kept my last car 23 years and 353,000 miles and used a variety of synthetic brands (10W-30) with a 10,000 mile OCI.
Believe me, if I had a compelling reason to use premium, or even midgrade, I would.
I am not enough of an anorak to mess with UOA. I have driven every car I've every owned longer than I probably should have and none have ever experienced a failure related to lubrication. I kept my last car 23 years and 353,000 miles and used a variety of synthetic brands (10W-30) with a 10,000 mile OCI.
Believe me, if I had a compelling reason to use premium, or even midgrade, I would.
- Status
Similar threads
- Locked
- Locked
- Sticky