Skip the auto shop - Our mechanics make house calls

Q: Incorrect spark plug replacement caused worse gas mileage

asked by on

I am searching for an original spark plug replacement number. I was told the wrong one and after installing it my fuel mileage has gotten worse. I have misplaced my manual. It is not a supercharged model. They are iridium plugs and are more expensive, but they are worth the cost when it comes to fuel savings. Where can I look or go in order to find the proper replacement number?

A: Hello there, thank you for asking about you...

Hello there, thank you for asking about your 1997 Oldsmobile LSS. AC Delco 41101 comes standard on these vehicles and must be used in order to maintain the ignition system properly. Also, find a maintenance schedule for the vehicle and make sure you have kept all maintenance up to date including air filters, spark plug wires, and the fuel filter. Hire a YourMechanic professional to inspect your decreasing gas mileage and replace the spark plugs or air filters if necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: My car has a lot of mileage. Is it road worthy?

Every single part on a motor vehicle will eventually fail or "wear out", and often parts will fail multiple times over the vehicle's life (for example, tires, brakes, rotors, water pumps, oil seals, timing belts, bulbs, hoses, and so forth)....

Q: Car has been shutting down for 9 months

Hello! Since you can hit the coil packs and it will start up, this leads me to believe the issue is directly related to the coil pack or the ignition module. Since you just had your coil packs replaced we...

Q: Door won't lock right

Hi there. There is a rod that goes from the outside of your door handle to about 4 inches from your locking mechanism. Putting pressure on this rod will free the locking mechanism to free it of any obstruction. The...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...