You might think you’re saving money by filling up with discount gas — but that few bucks saved at the pump could cost you hundreds (or more) down the road.
Pun intended.
Kalshi traders think there’s a good chance gas prices top $3.15 a gallon (48%) this month, so it’s a good idea to keep an eye on those big signs outside the station.
But, that said, avoid bargain-bin fuel.
Here’s what cheap fuel might be doing under your hood — and why your car deserves better.
Engine Knock
Cheap gas often lacks the detergents and octane levels your engine needs. That can cause “knocking” or “pinging,” where fuel combusts unevenly — damaging pistons and valves over time.
Dirty Fuel Injectors
Top-tier fuel contains additives that keep fuel injectors clean. Cheap gas? Not so much. Dirty injectors mess with your car’s performance and fuel economy — and repairs can run you $300 or more.
Clogged Fuel System
Low-quality fuel can carry more impurities. Over time, this gunk builds up in your fuel lines and filter, restricting flow and straining the fuel pump.
Failing Sensors
Poor fuel quality can trip up oxygen sensors, leading to faulty readings. That can throw off your air-fuel mixture and spark that dreaded check engine light.
Sluggish Acceleration
If your car’s engine isn’t getting the right burn from cheap gas, you’ll feel it — especially when merging or passing. Your car starts to feel lazy.
Lower MPG
Ironically, trying to save money with cheap gas can make your car burn more of it. Less efficient combustion = lower fuel economy = more fill-ups.
Damage to Turbochargers
Turbocharged engines require precision. Cheap gas with inconsistent octane or contaminants can damage turbo components, risking repairs that cost thousands.
Long-Term Engine Wear
Over time, cheap gas can cause more carbon buildup on engine components, increasing friction and wear — cutting your car’s life short.
Emissions Failures
Lower-quality gas can throw off your emissions system, causing you to fail a state inspection or damage your catalytic converter.
Warranty Issues
Many carmakers require top-tier gas for full warranty coverage. Using substandard fuel could void certain protections — leaving you on the hook.
