Engine oil reduce

Hi,

A certain amount of oil usage can be expected. How many miles are actually on the engine?

Many manufacturers indicate 1 quart of oil being used in 1,000 miles is normal. If it exceeds that, there is likely a problem.

How many miles have you put on the vehicle since the oil was changed and until you noticed it was low? Also, is there any blue smoke from the exhaust? Is there any evidence of oil getting into the air filter box?

Let me know. Also, confirm the PCV valve is in good condition and not plugged. This model isn't offered in the US, so I don't have any pictures to show the location of the PCV valve. However, it should be in one of the valve covers.

Let me know if you find it.

Take care,

Joe

More than likely you are burning the oil in the engine, or you are losing it into the coolant. Normally when the coolant and oil mix, they are both turned to sludge, but we need to check it just to be sure it is not.

However, if it is not then we need to suspect you are burning it. Here is a guide that will talk about this:

https://www.2carpros.com/articles/blue-smoke-from-engines-exhaust

To confirm this, we need to pull the spark plugs and see what they look like.

I am attaching a chart below that will help with this.

Also, we need to fill the oil back to the fill mark and then mark the dipstick or get a picture of where it is. It is easier to mark it because then after 500 miles we need to fill the oil back to this line and track how much oil it takes to get to that mark.

This way we can find out how much oil it is using. Once we know this we will know if we need to take serious action or if we can try to slow it down. However, once this starts it is pretty much just going to get worse.

Let me know what you find with this. Thanks

Those look great. One question. Did you check the oil when you stopped driving or after the vehicle sat for at least 5 minutes?

If you checked it immediately after running, then the oil can show low because there are at least a couple of quarts in the engine and heads.

If not, we need to start over because we can't rule out that the oil was never filled to the proper level.

What I would do is fill the oil to the proper level and mark the dipstick as to where the level is. Once it is marked, drive the vehicle 500 miles and then check the oil again and track how much oil it takes to fill it back to that level. This will tell us if this is an issue or not as we will know how much oil it uses in 1,000 miles.

Hi,

Yes, the spark plugs look fine. If you have no oil leaks and there is no blue smoke from the exhaust, there is a chance the engine rings are wearing.

By chance, have you checked the PCV valve or are you seeing any oil making its way to the air filter box?

Specifically, the PCV is what to check first. Toyota had an issue where the rings wore enough to cause crankcase pressure to be high enough to force oil into the PCV system. The catalytic converter was able to manage the oil and blue smoke wasn't noticed. It may be a good idea to check engine compression at this point as well. Also, how many miles are on the vehicle?

Here is a link that explains how to check compression:

https://www.2carpros.com/articles/how-to-test-engine-compression

Let me know if you have questions. Also, let me know the mileage of the vehicle. Above you indicated it has over seven million miles. If that is the case, well... LOL

Take care,

Joe