Q: what happens if you add a lead substitute to an engine that run premium unleaded?

asked by on

By adding the lead substitute and its catalytic safe, is there an upside or downside? The engine needs a valve job. Would that prolong the use of the engine without a valve job or am I just throwing my money away?

My car has 86000 miles.
My car has a manual transmission.

You should not add any lead replacements in this engine since the pistons and valve train is designed to not use it or need it. Lead was used to cool and lubricate the valves in older engines from the 60 and 70’s. You may harm your O2 sensors and catalyst over time with the lead additive.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. what happens if you add a lead substitute to an engine that run premium unleaded?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car stalls out if I fill the tank all the way

Does the Check Engine light illuminate when the car stalls? If so, a mechanic will be able to trace the issue with a scan tool. That said, this concern is likely related to the On-board Refueling Vapor Recovery (ORVR) valve...

Q: Is Brand-Name Gasoline Better?

Brand-name gasoline isn't necessarily better than independent label gasoline. Gasoline is gasoline. That being said, name-brand fuel does have some attributes and qualities that independent fuelers don't have. Let me explain. There actually is a difference in gasoline. That difference...

Q: Low voltage radio error

Hi there. Check the battery cables for any corrosion. If there is corrosion, then clean the battery posts with baking soda and water mixed. Then check the voltage on the battery. If the voltage is 12.6 to 12.4, then the...

Related articles

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.