16-18mpg?
03-07-2006, 01:46 PM
#1
Junior Member
Posts like a Ricer Type-R
Thread Starter
Join Date: Aug 2005
Location: Sweden
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
16-18mpg?
No matter what I do I can't get good milage with my -88 SSE.. It'* always around 16-18 mpg city/highway. This is what I have replaced so far to find improvement: Air filter, Oil and filter, spark plugs, plug wires, delco coils, themostat and a new delco oxygen sensor.
Engine runns good and the converter lockup is working. What am I missing here?
Engine runns good and the converter lockup is working. What am I missing here?
03-07-2006, 06:44 PM
#2
Senior Member
True Car Nut
Looks like you've hit the most likely stuff already. Some other ideas: Plugged catalytic converter? Tire pressure up? No dragging brakes? Leaking fuel injectors? Gentle acceleration. No WOT. And, wintertime. All of us in cold climates see reduced fuel economy in cold weather. Especially if we warm up the cars before driving and only do short trips. Just kills mileage.
03-07-2006, 06:57 PM
#3
Guest
Posts: n/a
With cole weather the older Bonnies will not do as well as the 94+... It takes a bit to get them warm enough to operate effiecently...
That milage for cold weather is not bad... Thats all city miles right? With a 2.97 Ratio trans 17-18 would be the norm for around town driving...
I might suggest a good bottle of fuel system formula to help clean things up a bit.. But other than that it seems as if you are doing ok...
I am in Florida where its warm most of the time and I usually pull off 19-21 mpg with a 2.84 gear ratio, and 31+ on the road...
so I'd say your bonnie is not too far off the beaten path..
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
That milage for cold weather is not bad... Thats all city miles right? With a 2.97 Ratio trans 17-18 would be the norm for around town driving...
I might suggest a good bottle of fuel system formula to help clean things up a bit.. But other than that it seems as if you are doing ok...
I am in Florida where its warm most of the time and I usually pull off 19-21 mpg with a 2.84 gear ratio, and 31+ on the road...
so I'd say your bonnie is not too far off the beaten path..
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
03-07-2006, 08:00 PM
#5
Senior Member
True Car Nut
Originally Posted by phoenix_flame220
how does the mileage of these old cars compare to a series 2 */c? The numbers seem very similar, despite the extra 80hp...
supercharges only take maybe 1mpg but you have to pay for premium so it is more like 2 mpg....
03-08-2006, 02:36 AM
#7
Junior Member
Posts like a Ricer Type-R
Thread Starter
Join Date: Aug 2005
Location: Sweden
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by bill buttermore
Looks like you've hit the most likely stuff already. Some other ideas: Plugged catalytic converter? Tire pressure up? No dragging brakes? Leaking fuel injectors? Gentle acceleration. No WOT. And, wintertime. All of us in cold climates see reduced fuel economy in cold weather. Especially if we warm up the cars before driving and only do short trips. Just kills mileage.
That milage for cold weather is not bad... Thats all city miles right? With a 2.97 Ratio trans 17-18 would be the norm for around town driving...
03-08-2006, 07:24 AM
#8
Guest
Posts: n/a
Originally Posted by grandam75
Originally Posted by bill buttermore
Looks like you've hit the most likely stuff already. Some other ideas: Plugged catalytic converter? Tire pressure up? No dragging brakes? Leaking fuel injectors? Gentle acceleration. No WOT. And, wintertime. All of us in cold climates see reduced fuel economy in cold weather. Especially if we warm up the cars before driving and only do short trips. Just kills mileage.
That milage for cold weather is not bad... Thats all city miles right? With a 2.97 Ratio trans 17-18 would be the norm for around town driving...
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
03-08-2006, 10:09 AM
#9
Senior Member
Certified GM nut
MPG
What spark plugs did you install? You could switch to a hotter plug and improve MPG in colder climates.
Also the front brake caliper slides tighten up on these cars causing the front brakes to drag decreasing MPG.
A complete cleaning of the throttle body and IAC, Maf sensors along with fuel injector cleaner in the tank will help.
Also the front brake caliper slides tighten up on these cars causing the front brakes to drag decreasing MPG.
A complete cleaning of the throttle body and IAC, Maf sensors along with fuel injector cleaner in the tank will help.
03-08-2006, 09:25 PM
#10
Senior Member
Posts like a Corvette
Join Date: Oct 2002
Location: New Jersey - Most of Our Elected Officials Have Not Been Indicted
Posts: 1,483
Likes: 0
Received 2 Likes
on
2 Posts
5W-30 vs 10W-30 motor oil in the winter might be good for an additional one-half mpg. You said that you replaced the thermostat. I'll have to assume it was a 195 F degree unit. Yes? I mean if you're in Sweden, you would want all the BTU'* a heater could put out! Also, you're probably taxing the electrical system by running the heater fan on High, The headlights are ON most of the time. And you probably have the rear defroster baking the rear glass too. Still, you should be getting closer to 20mpg if you're driving mostly highway.
