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Burning oil


Mrt23
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So I bought an is250 one year ago and I have put in 6l of oil. My last is200 I never put in anything apart from services.

some people have said this is standard and others have said it’s very bad news.

Would anyone know if this is normally the stem seals or the pistons? 
im not very mechanically minded and I don’t really want to get rid of the car.

I don’t mind paying a bit to get it sorted but not thousands.

it’s just past it’s MOT but emissions picked up due to oil.

any help/advice would be much appreciated 🙏

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Assuming you are using the correct type and viscosity of oil, and depending on your driving style, daily trip lengths, ambient temperature, terrain of driving and load, some oil will be consumed by any healthy engine.

Make sure you are using the correct ACEA C rating of engine oil. This rating depends on the High Temperature Shear Viscosity of the oil. Using the wrong HTSV oil will cause engine damage.  See ACEA oil specifications.

Check the compression of each cylinder. Worn piston rings and an engine that overheated will cause oil consumption.

Worn valve seals will also cause engine oil consumption. It is possible to change them without removing the cylinder head.

Inspect the spark plugs. A healthy engine will have the electrode porcelain colour light chestnut brown, indicating a stoichiometric combustion. An oily and sooty electrode indicates excessive oil consumption either from the piston rings or the valve seals.

Some engines other than Toyota and Lexus are designed to burn oil  about 1.5 litres per 1000 miles for normal driving conditions. The reason for this is to improve fuel economy at the expense of blocking the catalytic converters.

Chris.

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2 hours ago, Mihanicos said:

Assuming you are using the correct type and viscosity of oil, and depending on your driving style, daily trip lengths, ambient temperature, terrain of driving and load, some oil will be consumed by any healthy engine.

Make sure you are using the correct ACEA C rating of engine oil. This rating depends on the High Temperature Shear Viscosity of the oil. Using the wrong HTSV oil will cause engine damage.  See ACEA oil specifications.

Check the compression of each cylinder. Worn piston rings and an engine that overheated will cause oil consumption.

Worn valve seals will also cause engine oil consumption. It is possible to change them without removing the cylinder head.

Inspect the spark plugs. A healthy engine will have the electrode porcelain colour light chestnut brown, indicating a stoichiometric combustion. An oily and sooty electrode indicates excessive oil consumption either from the piston rings or the valve seals.

Some engines other than Toyota and Lexus are designed to burn oil  about 1.5 litres per 1000 miles for normal driving conditions. The reason for this is to improve fuel economy at the expense of blocking the catalytic converters.

Chris.

I’m using the correct oil and I’ve done a lot of research and read many forums.
I’m just getting to a point of I either get rid of the car or I fix the problem.

do you know what the price would be for either the seals or the pistons?

ive just bought a new exhaust which cost £900 so I’m reluctant to get rid but I’m not prepared to spend thousands especially seen I don’t have that kind of money.

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