Bad Gas Milegae
Thread Starter
Joined: Nov 2008
Posts: 32
From:
Bad Gas Milegae
when i first bought my 95 cadillac sedan deville i used to get 25 mpg's that was 3 yrs ago. its broken down on me a couple times to many for me. right now im getting about 8-14 mpg. i take real good care of it. i change the oil every 3 months i just did a tune up plugs, wires, fuel filter, air filter, pcv. ive put new starter a couple times cuz they would keep giving me bad mpg also. i always have my tires about 35 psi or 42. my tps was bad i just changed that a month ago but i'm still getting bad mileage.
any help anyone plz. and thankz for the help
any help anyone plz. and thankz for the help
Joined: Jun 2008
Posts: 69
From:
RE: Bad Gas Milegae
ORIGINAL: santanerox3
when i first bought my 95 cadillac sedan deville i used to get 25 mpg's that was 3 yrs ago. its broken down on me a couple times to many for me. right now im getting about 8-14 mpg. i take real good care of it. i change the oil every 3 months i just did a tune up plugs, wires, fuel filter, air filter, pcv. ive put new starter a couple times cuz they would keep giving me bad mpg also. i always have my tires about 35 psi or 42. my tps was bad i just changed that a month ago but i'm still getting bad mileage.
any help anyone plz. and thankz for the help
when i first bought my 95 cadillac sedan deville i used to get 25 mpg's that was 3 yrs ago. its broken down on me a couple times to many for me. right now im getting about 8-14 mpg. i take real good care of it. i change the oil every 3 months i just did a tune up plugs, wires, fuel filter, air filter, pcv. ive put new starter a couple times cuz they would keep giving me bad mpg also. i always have my tires about 35 psi or 42. my tps was bad i just changed that a month ago but i'm still getting bad mileage.
any help anyone plz. and thankz for the help
Thread Starter
Joined: Nov 2008
Posts: 32
From:
RE: Bad Gas Milegae
ORIGINAL: Tarrance
How could the starter give you bad mileage? Starts the car, that's it . . . right?
ORIGINAL: santanerox3
when i first bought my 95 cadillac sedan deville i used to get 25 mpg's that was 3 yrs ago. its broken down on me a couple times to many for me. right now im getting about 8-14 mpg. i take real good care of it. i change the oil every 3 months i just did a tune up plugs, wires, fuel filter, air filter, pcv. ive put new starter a couple times cuz they would keep giving me bad mpg also. i always have my tires about 35 psi or 42. my tps was bad i just changed that a month ago but i'm still getting bad mileage.
any help anyone plz. and thankz for the help
when i first bought my 95 cadillac sedan deville i used to get 25 mpg's that was 3 yrs ago. its broken down on me a couple times to many for me. right now im getting about 8-14 mpg. i take real good care of it. i change the oil every 3 months i just did a tune up plugs, wires, fuel filter, air filter, pcv. ive put new starter a couple times cuz they would keep giving me bad mpg also. i always have my tires about 35 psi or 42. my tps was bad i just changed that a month ago but i'm still getting bad mileage.
any help anyone plz. and thankz for the help
thats what i thought to the same as u
Tech Certified Members
Joined: Jul 2007
Posts: 1,319
From: pennsylvania
RE: Bad Gas Milegae
imo... a starter would have NOTHING to do with poor gas mileage...... its just a cawinkeedink! something else has changed in your car, or your driving habits.... diff gas,octain, weather being colder, etc.,etc
rickyd
rickyd
Thread Starter
Joined: Nov 2008
Posts: 32
From:
RE: Bad Gas Milegae
ORIGINAL: rickyd
imo... a starter would have NOTHING to do with poor gas mileage...... its just a cawinkeedink! something else has changed in your car, or your driving habits.... diff gas,octain, weather being colder, etc.,etc
rickyd
imo... a starter would have NOTHING to do with poor gas mileage...... its just a cawinkeedink! something else has changed in your car, or your driving habits.... diff gas,octain, weather being colder, etc.,etc
rickyd
Tech Certified Members
Joined: Oct 2007
Posts: 3,160
From: in the mitten
RE: Bad Gas Milegae
Engine designed for 91+ octane not 89. Timing likely retarded to deal with incorrect fuel and/or spark knock. EGR ports being restricted by carbon is common, throttle body has to come off to clear the ports. Retarded timing will reduce mpg.s
Member
Joined: Dec 2007
Posts: 44
From:
RE: Bad Gas Milegae
you say you never step on the accelerator, maybe that's why. The Northstar is a high performance engine, it has been designed and tested to handle high rpm and hard acceleration. If you never get the engine over 2000 rpm, it can carbon up and that would certainly cause you to have poor gas mileage, because it's choked up. Opening the engine up isn't racing, nor is it hard on it. It truly likes it.
running regular gas on an engine designed to run on premium can cause more problems than just lower gas mileage. People get away with it, but it's a very bad idea.
running regular gas on an engine designed to run on premium can cause more problems than just lower gas mileage. People get away with it, but it's a very bad idea.
