|
View Poll Results: What grade gas do you use?
|
|
Regular
|
   
|
51 |
82.26% |
|
Midgrade
|
  
|
7 |
11.29% |
|
Premium
|
  
|
4 |
6.45% |
09-03-2008, 01:04 PM
|
#1 (permalink)
|
|
VIVA LA MPG RESISTANCE
Join Date: Mar 2008
Location: Brownsville, Tn
Posts: 328
Thanks: 0
Thanked 2 Times in 2 Posts
|
Fuel Grades
Ok, who uses regular gas, and who uses premium? If you use premium have you noticed an FE difference in the two?
|
|
|
|
|
Today
|
|
|
|
Other popular topics in this forum...
|
|
|
|
|
09-03-2008, 01:27 PM
|
#2 (permalink)
|
|
Moderator
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672
Thanks: 35
Thanked 61 Times in 39 Posts
|
It depends. I buy regular for the Elantra and Shell V-Power (premium) diesel for the TDI.
|
|
|
|
|
09-03-2008, 01:42 PM
|
#3 (permalink)
|
|
EcoModding Lurker
Join Date: Aug 2008
Location: Exton PA
Posts: 35
Thanks: 0
Thanked 0 Times in 0 Posts
|
i choose regular for my cavalier, but when i had my focus i had the ecu flashed and could only use premium.
im going to on the next two tanks however give premium a shot and see if there is any difference, but i look at it as regular is cheaper, so it would have to be a great difference in FE to make the complete switch.
__________________
|
|
|
|
|
09-03-2008, 02:02 PM
|
#4 (permalink)
|
|
EcoModding Lurker
Join Date: Jun 2008
Location: Pittsburgh
Posts: 74
Thanks: 0
Thanked 8 Times in 5 Posts
|
I use 89 in my DD an 87 Turbo Volvo. The owners manual says 91 but since I hardly ever go into boost why should I spend the money on octane I'm not using. 87 makes the car run poorly and it has pretty poor pick up if you have to put the pedal down.
|
|
|
|
|
09-03-2008, 02:08 PM
|
#5 (permalink)
|
|
EcoModding Lurker
Join Date: Jun 2008
Location: Glassboro, NJ
Posts: 88
Thanks: 0
Thanked 0 Times in 0 Posts
|
I've used both premium and regular in my bike and have noticed no difference. The manual says use premium, but I have a small engine that just doesn't have the compression to completely burn premium.
__________________
Goal one= 30mpg on The Monte by changing the nut that connects the steering wheel to the seat.
|
|
|
|
|
09-03-2008, 03:03 PM
|
#6 (permalink)
|
|
Pokémoderator
Join Date: Dec 2007
Location: Southern California
Posts: 5,493
Thanks: 338
Thanked 417 Times in 285 Posts
|
Will -
I ran Chevron 91 last year because of my HAI (hot-air-intake => lean-burn => higher octane is better to avoid knocking/pinging). I switched to 87 when the gas prices got too high, didn't notice a change, and never switched back.
I have a hankering to up the octane again because my car is *different* from last year. I also think it has been on 87 for so long that I might be able to detect a difference in the way it drives (big *shrug*).
CarloSW2
|
|
|
|
|
09-03-2008, 03:11 PM
|
#7 (permalink)
|
|
EcoModding Apprentice
Join Date: Aug 2008
Location: Statesboro, GA
Posts: 177
Thanks: 0
Thanked 0 Times in 0 Posts
|
Even if it did yield better FE, from a cost perspective it would have to make up for that 20 cents or so per gallon to truly make it economical. I wouldn't mind seeing some data on it. I'm not quite sure it's worth the gamble of higher fuel prices for few tanks, personally. I'm sure it's been looked at before somewhere.
__________________
"It is foolish and wrong to mourn the men who died. Rather we should thank God that such men lived."
- General George S. Patton, Jr
|
|
|
|
|
09-03-2008, 04:09 PM
|
#8 (permalink)
|
|
Master EcoModder
Join Date: Dec 2007
Location: Texas
Posts: 1,400
Thanks: 121
Thanked 123 Times in 87 Posts
|
Bailout at CleanMPG, with his commute up and over a rocky mountain pass in a Yaris, tested this.
regular was best
-4% mpg with midgrade
-9% mpg with premium
I think I'll stick with the cheap stuff.
__________________
- - - - -Best 11-mile commute: 105 mpg
- - - - -Best tank: 88.5 mpg / 1133 miles
|
|
|
|
|
09-03-2008, 05:07 PM
|
#9 (permalink)
|
|
Hybrid Student Driver
Join Date: Nov 2007
Location: Kansas City Area
Posts: 1,712
Thanks: 21
Thanked 20 Times in 19 Posts
|
When I had my HAI (160F) I used premium to prevent detonation, but the cost-benefit was off. Now, intake temps are 100-120F with full advanced timing and no ping with near-full load (some knocking at high RPM, so I don't go there much).
The TSX "requires premium", but runs just fine on regular. The savings add up. FE is the same too. There's a bit of stumble from time-to-time at 6k RPM with VTEC, but again, very rarely used.
Long live 87!
RH77
__________________
Supporting those devastated by the Joplin Tornado
EF5 / 22-May-2011
 _
 _
|
|
|
|
|
09-03-2008, 05:36 PM
|
#10 (permalink)
|
|
X-Frenchy: very
Join Date: Jun 2008
Location: Toulouse, France
Posts: 591
Thanks: 6
Thanked 30 Times in 21 Posts
|
In my 11 years old turbo diesel I used only regular and mid-grade during years.
One of the rules to eco-drive is to shift up soon, but it had difficulties to stay at 1500rpm. During the first premium tank I felt changes and now (at 4th tank) it can accelerate from 1200-1300rpm.
Because it permits me to improve my eco-driving style premium permits me to have a better mileage. Currently I'm staying with the premium as while I'm saving 33% of diesel, I'm saving 30% of money. May be one day it will be the placebo effect... My mechanic maintains my car, but premium seams doing things my mechanic doesn't...
Denis.
__________________
Save money & CO2 at home : http://ecorenovator.org/ 
Created and managed by the creators of http://ecomodder.com/ 
---
Earth and health are priceless, so are kilotank and AT-PZEV
Best Mégane tank: 1268.9mi @ 77.847 MPG(US)
2008/06-2011/10 saving: - 5725.5 kg CO2 (5342.6+382.9)
- Diesel / Money: 42.17% = 2446.25€ = 3357.26$
---
megane : thread - kill switch.
|
|
|
|
|
