Q: Engine Oil Consumption

asked by on January 13, 2017

About every 1000 miles I need to add engine oil about 3/4 quart. What should be normal consumption? I have some synthetic Mobil1 5w-20 oil. Can I use for top up? I use regular 5W-20 oil.

My car has 82000 miles.
My car has an automatic transmission.

Conventional, mineral-based engine oil and synthetic engine oils are completely miscible and thus you can top off with either. Your oil consumption is relatively high. There is a wide range of values for the "normal" or average rate of oil consumption but a bottom line is using close to one quart in 1,000 is outside the normal range. You have either an external leak, and/or oil is getting into the combustion chambers from leaking valve stem oil seals, leaking valve guides and/or leaking piston rings. Any of these potential sources can be evaluated by a certified Mechanic during an oil leak diagnostic.

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

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

My electronic throttle control light is flashing and when I press on the gas pedal it doesn't go pass 20-30 mph and stalling

Hello. Thank you for writing in. The two sensors work together to track the location of the pedal as its being depressed. One is located on the pedal while one is located on the firewall. It is best to replace...

My back tires won't rotate when I try to back up the back driver side wheel starts to feel like it's raising

Hello, thank you for writing in. There may be one of several issues going on. To start, this may be an issue of the parking brake not releasing. This should be inspected by a brake specialist, or by someone who...

No spark or fuel

Hi there, typically when replacing the water pump, you shouldn't have to worry about engine timing. Is there a security light on the dash? There may be an issue with the chip in your key that is preventing the car...

Related articles

A Buyer’s Guide to the 2011 Mazda RX-8
The The 2011 Mazda RX-8 is a sporty, two-door coupe that is able to seat four people (two in the front and two in the rear). While this was the final year of production for the RX-8, it definitely made...
Hyundai Certified Pre-Owned (CPO) Car Program
If If you have been shopping for a used Hyundai vehicle, you may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on...
The Best Used Cars to Buy If You’re an Athletic Coach
If If you are an athletic coach, you need a used vehicle with tons of room to transport gear. Once in awhile, you may have to take a player or two along with you as well. What this means is...