Question about 1995 Oldsmobile Ninety Eight

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Had motor replaced in 1995 Olds 98. Gas mileage went from (old) 32 MPG to 25 MPG. 2000 miles on new engine. What gives?

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If you are using an EFI engine and the old computer module is still used, have it reset first. It may still have the data from the old engine. If you are using an old engine, you may have to do additional inspection and see if there are worn out parts. For crate engines (brand new) it would need a break in period, normally less than 800-1000 miles.

Posted on Dec 11, 2009

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Please help; my Cadillac Concours 1995 use fuel ? tooooooooo much in 100 km use ? 35 liters (9 gallons) without any smoke or missing. What is problem and how can I fix it????


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Edmunds.comFeatures and specs for the 1995 Cadillac DeVille including fuel economy, transmission, warranty, engine type, cylinders, drive train and more.Missing: 100km

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History of Cadillac automobiles for 1997. ... 1997 CADILLAC DEVILLE ... Fuel Economy City/Hwy, 13.8 l/100 km - 9 l/100 km (20.4/31.2 mpg-imp) (17/26 mpg US).

Jan 25, 2016 | Cadillac Cars & Trucks

1 Answer

How to increase mileage in a 1998 olds 88 royle with a 3800 engine


tune up carburetor, wheel alignment, tire balance, rotate tires, put a fuel cleanser in your gas tank. hook up to a computer for other problems related to car.

Jun 18, 2014 | 1998 Oldsmobile 88

1 Answer

Low gas mileage city and hiway @ 4-5 MPG below MSRP sticker data of 15 and 21MPG on a NEW 2013 Silverado. 2000 miles on odometer and mileage not improving.


is this calculated mileage or what the estimated mileage is showing on the dash. Have you checked to see what you get on just the freeway?

What are your driving habits like?

How is your tire pressure?

Do you make a lot of short trips?

Apr 11, 2013 | Cars & Trucks

1 Answer

My 1992 isuzu pickup use too much gas. how can I inprove my mpg.


I'm not sure of the mileage on your truck, but there are a number of things that you can do to improve your gas mileage. If the truck has over 100,000 miles, the next time you change your oil you can choose engine oil that is specifically designed for high mileage vehicles (make sure that it is the correct weight for your vehicle) Change your air filter, this has alot to do with fuel efficiency. Make sure that you get your tires rotated and balanced every 5,000 miles. Also check your tread wear on all 4 tires. If you have significantly uneven tread on your tires this can have a drastic effect on mpg. Check your plug wires: if they look worn and old replace them. If they appear to be in good shape then you can get away with only getting new spark plugs. If you are really dedicated to the truck you can always opt for a fuel system flush at your local service station, I know they offer this service at Midas in my area for $99. Lastly I used to have 98 Stratus that got poor gas mileage. I started putting a bottle of the STP treatment (in the black bottle not red) during every fill up and it averaged an extra 40 miles per tank. Hope this helps.

Mar 28, 2011 | 1992 Isuzu Pickup

1 Answer

My Mother-in-law age 86 drove her 95 Olds Ceria to the grocery and when she came out it would not start. It was fine when she went in to the store. It has 35,000 miles on it. What do you think happened?


sounds like the fuel pump went out, a fuel pump doesnt go out by mileage all the time they can also go out do to age the car being a 95 makes the car 16 years old so that is the first thing i would check take off the gas cap and put your ear to the nozzle and have someone turn the key to the on possition and listen for a humming sound if it doent make a sound your fuel pump is defintely went out. hope this helps.

Jan 02, 2011 | 1995 Oldsmobile Cutlass Ciera

2 Answers

What is the mpg for 84 olds delta 88 royale brougham


Hard to say on a older car such as this. If running well and healthly it should receive around 16 to 18 highway miles per gallon

Jul 16, 2010 | 1984 Oldsmobile Delta 88

3 Answers

98 dodge caravan uses lots of gas


You do not say what mileage you are getting. Your vehicle will get from 12-17 MPG in the city and 17-24 Highway depending on many factors. Your vehicle is 11 years old and if it has near 100,000 miles I suggest you replace the spark plugs and plug wires. Keep the tires inflated to the pressure listed in your owner's manual and on the driver's door post. Replace the air filter every 30,000 miles. Drive the speed limit, and take off slowly. If you are getting near the maximum of 17 city & 24 highway, then there is not much you can do to improve mileage. So, exactly what mileage are you getting?

Dec 16, 2009 | 1998 Dodge Caravan

1 Answer

1997 Dodge Ram 1500 4WD 5.9, Changed tire size from 265 to 315.


The better the engine breaths the better the mileage. Was the new computer a stock computer or performance?

May 31, 2009 | 1997 Dodge Ram 1500 Club Cab

1 Answer

1995 Olds 98 had oil pan gasket replaced. Oil lite came on,


The oil pump broke down or the oil pickup was blocked not feeding oil to the engin. The bad news, the engin is probely ceised and will cost a lot of money to repair, if it is repaireble.Alternetive is to replace the engin. Could be cheaper than repair.

May 18, 2009 | 1995 Oldsmobile Ninety Eight

2 Answers

Heat


AC temp mode control motor.

Jan 06, 2009 | 1995 Oldsmobile Ninety Eight

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