Subaru XV Engine Problems

The auto in your car is a continuously variable one, and the sound you describe sounds like the noise you get from a CVT. If it has become louder in recent times it might be a good idea to have the transmission replaced.

The shudder on take-off suggests a transmission problem, but the other issues are unlikely to be related to the gearbox. Get it to a Subaru dealer or specialist and have it checked out.

I would use the factory recommended oil, at least while the car is under warranty. Once the warranty has expired you could use the Mobil oil and shouldn’t experience any problems.

Boxer engines are known to use oil because of their design and the Subaru mechanic we spoke to said the consumption you are claiming isn't alarming. He isn't aware of a problem with oil consumption, but told us that it is important to have the car serviced as per Subaru's schedule and to use the recommended oil.

The XV is underpowered, as well as having a very dozy CVT. If you are that worried I would definitely suggest a brand swap to something with a regular automatic.

There are no standards as such, and each carmaker determines how much oil consumption is acceptable for their own engines. There are reports of excessive oil consumption on Subaru models, including the XV. American owners have launched civil action against the company alleging problems with piston rings are causing the problem. Subaru is replacing piston rings on affected vehicles in that country. Do the tests they request and then work out a solution once the results are known.

It's totally normal for engines to consume a little oil and your consumption is well within acceptable limits. Far too many people ignore sensible checks of the oil level and tyre pressures these days.

The XV is equipped with an idle-stop function, which is designed to reduce fuel consumption. The engine cuts out when you come to a stop, and starts again when you accelerate off again. It's hard to say for sure from your description, but it would appear that the system is working correctly. If you're not sure it is, take the car back to your Subaru dealer and have it checked.