need help I have a 2006 gs300 113,000 miles kept in vet good condition reg oil changes no mech problems until as of lately, low oil light comes on 1,200miles befoe scheduled oil change. I put 1QT of oil in it, light goes off, 3 DAYS LATER the light comes back on. take to get it checked the stick is dry, but there are no oil leaks, any suggestion? has anyone had this problem? my mechanic says it time for a new engine? and advise? thanks

 

its Probably burning oil it’s very common for the gs300 something to do with direct injection or so I’ve read also heard it builds up carbon

 

Sorry to tell you bro but your suffering from the dreaded carbon buildup that some 2006 gs300 models occur. The carbon buildup makes the engine basically eat the oil that's why you don't see any leaks. I have a 2006 gs300 AWD 89000 miles luckily no oil consumption yet. Not all but some 2006 models suffer from this carbon buildup problem. What I would suggest is getting the engine cleaned of all the carbon buildup/deposits and it should be fine. You definitely don't need to replace engine yet. I also would suggest changing oil every 3000 miles instead of 5000 miles regardless of what oil you use to limit oil being burned eaten etc. Also always use top tier premium gas.

 

I wouldnt say the engine needs to be replaced, you can have a shops remove the heads, and from there you should have access to the pistons. This way you leave the block, transmission and crank still in the car.

But before that, I would go a chemical route. First off I would pull the intake manifold and manually with chemicals like seafoam and long brushes scrub down the valves and intake ports. Another option is to take it to a bmw/mini mechanic that can do walnust blasting, they take off the intake manifold and spray walnut with a vaccum. Both ways will get the job done!

Next you gotta deal with the carbon thats actually burning your oil. Remove all your spark plugs, pour a good amount of seafoam inside each spark plug hole. Keep an eye on which one drains the fastest, because more likely thats your problem piston. Let the seafoam sit overnight. Then with the plugs removed spin the engine over without the plugs this will spray the majority of your seafoam out. Reinstall the plugs let it warm up then drive the car hard.

Another thing you can do is, pour small amount of seafoam into the oil and change the oil more often. This will help clean the engine internally. Because the problem is that the carbon seeps from the intake valves and cruds up the pistons. Eventually that crud will work down inside the piston rings. You have 3 levels, 2 top are compression stroke and 3rd is oil control rings, your oil rings are more likely giving you the issue. Theres tiny drilled holes behind the oil rings that get clogged with carbon. Try the chemical way its the cheapest and will make your car run better, if it wont completely heal it, atleast it will buy you some time.

 

so use the entire can of seafoam? for the engine?

 

You will need several bottles of seafoam

This is how to do the head cleaning

This is how to soak the pistons

 

Yeah try seafoam

 

You may want to add back seafoam instead of oil. Read the can. Seafoam can clean the pistons. Also use a good cleaning oil like pennzoil plat ultra. Conventional oil is a mistake for that car (esp with the single direct injection). Maybe with a 3K oci.

 

I did the vacuum line with seafoam method and it helped a bit, warning: you will get a lot of smoke lol.