Q: For coolant / antifreeze

asked by on

I bought STP universal antifreeze / coolant Premixed 50/50 Do I still need to mix this with 50% water

No, do not add water. The fluid is ready to go out of the container. Your car may already have a particular antifreeze in it, particularly if the color is distinctly red, pink, green, etc. (each color denotes a different type). If the color is clear and striking, you should find out if the existing color matches the color of the antifreeze that is specified in your owner’s manual.

If it matches, use that type/brand of antifreeze, and not universal antifreeze. When you mix different types of antifreeze (i.e., different chemistries or additive packages) you degrade the service life of the corrosion inhibitors. If you suspect you already have a mishmash of different coolants in there already, the best thing by far to do is just drain and flush the system (which should be done anyway for a 20 year old car) and install factory specified coolant.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. For coolant / antifreeze

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: Wiring harness burned up

Hello. Burned spark plug wires will prevent the spark plugs from firing properly. Ultimately, this will prevent the car from starting. The timing shouldn't be effected by the burned wiring harness. The first step would be to replace the wiring...

Q: If drain is clogged, could the water also get into the trunk?

Hey there. The sun roof system runs the full length of the interior of the vehicle under the roof interior panel. The drains for the sun roof are on each front corner of the roof system and run down each...

Q: Hearing bubbling/gurgling under dash in engine when I accelerate slowly (in parking) 2005 Mazda 3

Hi there - I suspect the "gurgling" you hear is coolant, with an air pocket circulating in the heater core under your dash. You mention that your coolant level was low, and you had to add some on an incline....

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 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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.