Q: Oil burning off 1 1/2 quarts every 200 miles

asked by on

After my pickup was leaking oil, I replaced all of the gaskets and seals that were leaking. My pickup now has a spotless engine. But after this, the oil kept reducing by 1 ½ quarts every 200 miles. I changed the PCV valve to see if that was the cause, but that did not make any difference. When I looked at the oil, it looks normal in color and consistency and so does the coolant. The exhaust is not smoking. Running a compression test, without oil, was 120-130 psi on all cylinders. It seems to me that burning 1 ½ quarts every 200 miles would be showing some smoke. I am using old oil because purchasing new oil on a constant basis was getting too expensive! I am wondering if perhaps it is running a little rich and that is why it’s burning oil so quickly. What is your advice for fixing this problem?

Hello there, thank you for asking about your 1994 Isuzu Pickup. For your vehicle, minimum compression is 114 PSI and all cylinders should read within 70% of each other. So, according to your results, compression is good. My guess is that the clearance between the valve guides and valves is excessive or that the valve guides seals are worn. Either scenario could result in an engine that sucks down oil but still has good compression. Either way, a quart and a half every 200 miles means something is wrong, very wrong. I suggest you have a professional, such as one from YourMechanic, diagnose your low oil problem and repair your truck firsthand.

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. Oil burning off 1 1/2 quarts every 200 miles

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: Air suspension failure due to damaged components?

Hello, thank you for writing in. The only component that should be in that area is the air suspension strut itself, its sensor, and its electrical connections. Due the the damage being electrical, its possible you have tampered with that...

Q: Q: Ignition won't turn

Hi there. Most of the time this is caused by a key that is worn out or the lock cylinder being worn internally. I usually use some silicone lubricant on the key and in the lock cylinder to get the...

Q: Q: Car stalling and jumping.

This car has a transmission that has solenoids that control the shifting and sometimes the solenoids or speed sensor causes erratic shifting. The vehicle would have to be tested to see what codes are in the computer and diagnose 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...
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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...