Gas Gas Gas!!!!!
11-28-2006, 02:32 PM
#1
Bubblicious? DEF.
Thread Starter
Join Date: Mar 2004
Posts: 4,062
Likes: 0
Received 0 Likes
on
0 Posts
Gas Gas Gas!!!!!
soo what gas do you guys use? i was reading something last night (cant remember what thread it was) but it said something how someone tried 96 octance fuel and got worse MPG... he got like 16mpg and it was all freeway... also something about how the high octane causes harder ignition?
im asking this because ive been usign shell v power which is 93 octane... and lately my cars been running funny. could it because of the gas? should i switch back to mobile 91 super?
im asking this because ive been usign shell v power which is 93 octane... and lately my cars been running funny. could it because of the gas? should i switch back to mobile 91 super?
11-28-2006, 02:37 PM
#2
Administrator
iTrader: (7)
winter formula maybe? I believe they change something in the fuel for the colder months.
I've pretty much always used Shell 91 octane (highest octane most stations carry in CA)
As for mpg... oh boy, lets not go there.
I've pretty much always used Shell 91 octane (highest octane most stations carry in CA)
As for mpg... oh boy, lets not go there.
11-28-2006, 02:58 PM
#3
I can regularly hit 22 mpg freeway miles on 93. On 92 I got in Ohio? 22 mpg. It has more to do with your engine and then the octane. You either have a high enough octane or you don't. If you poke around, you'll find people running 87 without issues. Energy content of the gas is a chemistry discussion most people wouldn't find interesting. So, if your engine is running funny on 93, you either got bad gas, your car doesn't like winter mix, or your engine is just running funny.
If it persists through a couple tanks, I'd get your car checked out. I switch between Mobile, Sunoco, and Shell regularly. I'd wager the winter mixes they use are very similar.
If it persists through a couple tanks, I'd get your car checked out. I switch between Mobile, Sunoco, and Shell regularly. I'd wager the winter mixes they use are very similar.
Last edited by maxxdamigz; 11-28-2006 at 03:00 PM.
11-28-2006, 03:25 PM
#4
Metatron
iTrader: (1)
Winter....
Yeah, you probably got a good dose of winter gas.
I wouldn't put much credence in the "high octane burns slower" theory, it is simply more resistant to detonation (which has nothing to do with normal combustion or power, or "hard-to-ingiteness"
)
I have run a whole tank of 115 and just got exactly my normal mpg (around 19 overall). Sad, expensive, but true.
S
I wouldn't put much credence in the "high octane burns slower" theory, it is simply more resistant to detonation (which has nothing to do with normal combustion or power, or "hard-to-ingiteness"
)I have run a whole tank of 115 and just got exactly my normal mpg (around 19 overall). Sad, expensive, but true.
S
11-28-2006, 03:37 PM
#6
He's as bad as Can
I use either Exxon / Shell 89 Octane except for track weekends when I use 93 of what ever is near the track. I have 80,000 miles, get about 21 MPG and have had no major issues.
11-29-2006, 12:02 PM
#9
When I kill a tank on the highway, it's sitting in 6th doing 3500-3800 rpms for hours. I've driven the car out to Ohio, Harrisburg PA, and Myrtle Beach SC. As far as tooling around town, I get in the high teens. I've been able to get as low as 11.4 with some near-tracklike driving. My mileage most definitely varies.
11-29-2006, 02:47 PM
#10
Got Another Rotary
I run "top-tier gasoline" (Shell 93 most of the time) and a fuel additive from Lube Control called "FP60".
Top Tier Gas (http://www.toptiergas.com) meets an enhanced manufacturers standard for deposit control. Lube Control FP60 is a great lubricating cleaner (http://www.lubecontrol.com).
May seem like overkill, but this is what I do to get great cleaning power to help keep these carbon-generating engines free of build-ups (in addition to the Sohn/Idemitsu mod).
Top Tier Gas (http://www.toptiergas.com) meets an enhanced manufacturers standard for deposit control. Lube Control FP60 is a great lubricating cleaner (http://www.lubecontrol.com).
May seem like overkill, but this is what I do to get great cleaning power to help keep these carbon-generating engines free of build-ups (in addition to the Sohn/Idemitsu mod).
Last edited by Jax_RX8; 11-29-2006 at 02:53 PM.
11-29-2006, 11:31 PM
#12
I always use 93 now, Between BP, Mobil and Shell.
I would say about 45% BP, 35% Shell and the rest are Mobil. Not because Mobil is far, actually its the closest one to my home. But usually I check prices before I do fill ups. call me cheap ok, the BP is about 4 blocks away from Mobil. and sometimes one is cheaper than the other, I tried a couple of times the differents is like as much as 15 cents !
Shell is nowhere close to my home, but its very close to my gf's home ... ahh you know why
Plus I add about 5-6 oz of Idemitsu before fillups ... no problems whatsoever
I would say about 45% BP, 35% Shell and the rest are Mobil. Not because Mobil is far, actually its the closest one to my home. But usually I check prices before I do fill ups. call me cheap ok, the BP is about 4 blocks away from Mobil. and sometimes one is cheaper than the other, I tried a couple of times the differents is like as much as 15 cents !
Shell is nowhere close to my home, but its very close to my gf's home ... ahh you know why
Plus I add about 5-6 oz of Idemitsu before fillups ... no problems whatsoever
11-30-2006, 08:55 PM
#13
Registered User
Join Date: Nov 2006
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
I agree with Jax RX8. Run a top tier fuel if you can. The deposit control is much better with these fuels in the long run. The reduced detergents in other fuels may be the cause of some of the port deposits blamed on synthetic oils.
12-01-2006, 05:12 AM
#17
Rotorheaded Geek
Join Date: Oct 2006
Location: Manchester,NH
Posts: 517
Likes: 0
Received 0 Likes
on
0 Posts
Now keep in mind depending where you are they use the Ron Octane rating, Mon Octane rating or the average (US) (ron+mon/2) rating. I believe the Ron rating is normally higher then the mon so when averaged you get the ratings like what we see.
