SC- 1st Gen (1992-2000)

453 miles to the tank? Is this normal?

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Old 10-17-07, 01:49 PM
  #31  
xspsi6
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Just seafoamed it last month and put an intake on other than that nothing else really. The nitrous prolly helps keep it clean in the meantime.
Old 10-17-07, 02:18 PM
  #32  
atxishome
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Yeah I broke 500 one time on one of my many trips between Omaha, NE and Austin, TX. If it's ALL highway, I usually get 450-470miles/tank, but jettin around the city here all I get is 300-325 (Mine's a 5-spd as well).

~Joe
Old 10-17-07, 04:06 PM
  #33  
CDY
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Originally Posted by pnyboy27
thats some pretty good gas mileage you got there! haha..have you ever cleaned your engine? is that why your running so well there too? if not, that may help even more..thats what i need to do though. the whole spark plugs, wires, oil change, seafoam, and intake.
Careful though, with older engines the gunk inside can be holding seals together, so seafoam can actually cause problems if your engine has been dirty for a while.
Old 10-17-07, 07:10 PM
  #34  
SCFrogger
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i drive in the city in DC, when i get on the highway its barely for a couple of minutes usually. i sit in stop and go traffic and then when i get home i drive around in stop and go traffic for 10-30 minutes hunting for parking.

i get About 260 on a tank if im lucky and not flooring it. i hate traffic.
Old 10-17-07, 10:59 PM
  #35  
fwynn
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Originally Posted by WICKED SC4
Every single time I have driven to cali, the traffic is averaging 85-95mph. I mean even the big Semi's and RV's are doing 90. You going 75- expect to be passed like you are standing still. Where do you live in Cali where they don't drive 90? Must be close to Oregon or something. So cal is the absolute worst- I hate driving in Cali.

Why would you turbo your car if you are afraid to drive 90mph? Stock can do that.

BTW I usually get 330-350 miles to a tank in the city, the times I have done all highway miles, it was around 450. You must be a long distance commuter. My car is a 92 SC400.
hmm for some reason when i go to LA.. the traffic is at.. like maybe 80 tops.. average.. O.O
maybe i need to go to the freeway ur at

freeways near me.. 92882 area.. they usually 75ish
but then again.. i travel around 65-70... soo i wont have to worry abuot cops.. since my tint is already dark.. and i dont have a front licence plate.. and yea :]
Old 10-17-07, 11:17 PM
  #36  
pnyboy27
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Originally Posted by CDY
Careful though, with older engines the gunk inside can be holding seals together, so seafoam can actually cause problems if your engine has been dirty for a while.
okay, so how do you go about cleaning your engine then?
Old 10-18-07, 02:13 AM
  #37  
SClean4
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gas is killing me...$40 a fill-up...I want a '90s Toyota Camry 2-door (I love those things) as a second car to save money on gas...or any 4-cyl.
Old 10-18-07, 02:42 AM
  #38  
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Originally Posted by pnyboy27
okay, so how do you go about cleaning your engine then?
If you plan to run seafoam through the pvc or intake manifold, then you shouldn't really worry too much. The problem that people have is when they pour seafoam into the oil crankcase. That can cause oil leaks if your seals are not in ideal conditions. If the seafoam is going straight to the combustion chamber, I can't really think of any oil seal that's in the way.

Otherwise just leave the engine the way it is (run a bottle of fuel injector cleaner) if you're paranoid about damaging something.
Old 10-18-07, 09:41 AM
  #39  
Gunnar
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You can also put seafoam into the gas tank to help clean the fuel injectors.

One important thing to remember, if you're going to seafoam your car, change your plugs and oil when you're done!
Old 10-18-07, 10:30 AM
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CDY
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Originally Posted by GSteg
If you plan to run seafoam through the pvc or intake manifold, then you shouldn't really worry too much. The problem that people have is when they pour seafoam into the oil crankcase. That can cause oil leaks if your seals are not in ideal conditions. If the seafoam is going straight to the combustion chamber, I can't really think of any oil seal that's in the way.
True... sorry if I was a little vague. Seafoam is harmless in the intake or gas tank, it's only the crankcase where you might have issues. Even then, you usually only have to worry if your car has gone for a long time without an oil change. With ~120k miles of regular maintenance I wouldn't worry about it.
Old 10-18-07, 02:30 PM
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pnyboy27
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okay..so if i put it into the gas tank..i dont have to worry about changing anything there do i? or do i have to change the fuel filter? and yea..i also change my oil every 3k with 5w-30 full synthetic..i have about 128k mi also.
Old 10-18-07, 09:02 PM
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5spd ftw, for some reason, my gas mileage has been going up, i get around 390 to 400 per tank (17.5-18gallons) but in my 92 SC i got 320 MAX a tank.. weird..
Old 10-18-07, 09:42 PM
  #43  
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Originally Posted by pnyboy27
okay..so if i put it into the gas tank..i dont have to worry about changing anything there do i? or do i have to change the fuel filter? and yea..i also change my oil every 3k with 5w-30 full synthetic..i have about 128k mi also.
u shuoldnt have to worry abuot putting seafoam in the oil or.. PCV.. cause ur running synthetic.. and im sure u change often? like 5k miles? or something like that..

just put like a half can in the oil before u fill up.. to clean the fuel injectors

shouldnt need to worry about anything really
Old 10-19-07, 07:46 AM
  #44  
Smithule
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You guys getting 400+ miles, are you using like Super Octane or something. I can't get near that even when it's all highway miles, but I use the lowest octane at the pump. The most I've ever gotten is close to 350 on my 96 SC400 auto
Old 10-19-07, 09:11 AM
  #45  
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Originally Posted by Smithule
You guys getting 400+ miles, are you using like Super Octane or something. I can't get near that even when it's all highway miles, but I use the lowest octane at the pump. The most I've ever gotten is close to 350 on my 96 SC400 auto
And this is why you get worse gas mileage. Don't stinge out on a few bucks when filling up on gas. Do whats recommended. If it says Use Premium, then do just that, use Premium. As for Octane ratings here, I fill up on 93.


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