High oil comsumption CSR1000

Hello,

I'm sure this topic has been discussed before but I want to ask again. My CSR1000 sucks a lot of oil, I ride maybe 300 mi in a week and I have had to add as much as 1 qt. in that time. It only has 13K mi. on it. This has occurred pretty much since I've owned it and I got it with 2.5K on it. No leaks I can detect, compression is 155 to 160 and the engine is clean, no way that much is leaking, only unless it's dropping out the bottom somewhere which I'd see a few drops when I park it and I don't, my parking spot is spotless.
I did read to check the breather/vent and I will for sure. Did they ever have auto chain oiling? I've heard of that but never seen it. Someone also said valve seals which is a possibility, she sat many years unused, they could be dried out.
Thanks guys, ride safe!

If it sat for a long time I would suspect valve stem seals and cylinder walls.

I had an old Plymouth Duster that blew about a quart every 300 miles. I drove it about 100k miles that way. It probably is blowing by the rings. Do you see any white/blue smoke out the exhaust when you accelerate?

To possibly aid diagnosis ---

With engine idling (just after being started when cold), would spray water mist onto header pipes, to assure engine has combustion on all four cylinders.

What weight oil is being used, and at what level is being maintained in the sight glass?

While riding, is there continuous blue smoke from the mufflers?

Would also suggest re-performing the compression test, and better yet, a leak down test, especially to determine whether compression is being lost down past the piston and into the crankcase.

Am thinking 128~156 psi is standard compression, so 160 psi seems too high. Perhaps from excessive carbon build-up from oil burning.

Good Fortune!

A leak down test is likely the best way to find out what condition the rings and valves are in. If you do not have the equipment and do not want to buy or borrow it, then redo the compression test, first dry, then with a spoonful of oil in each cylinder. If the readings with the oil are significantly higher, then rings are suspect.

More than likely, otakar is on the mark.

Maybe when I grow up, I'll type as fast as Patton.

Wondering if any previous engine work was done where an oil ring might have been broken during re-assembly.

This could permit good compression accompanied by oil burning.

Good Fortune!

Oil ring is 3 pieces and the expander has to have the ends butted together, maybe possible that this was missed when engine was assembled. I've seen a brand new factory motor have flaws like this: Dodge V-10 no oil scraper rings only an expander on 1 cylinder. It drank oil like I do good beer! I suppose that the stem seals could have been miss installed or missing. Sound like a tear down will be in order, but maybe in the winter. If it runs good you may just keep the level up until you get tired of adding oil, just don't let it get low.
Also since it sat it could have some rust pits in the cylinder wall.

OK, you guys lost me on something here...

Rings: If shot, not sure he would be able to obtain such high compression readings...

Valve valve/seating/seals... pretty much the same plus I would think this thing would smoke (White color) like a chimmeny....

No mention of loss of power....

Ring end gaps off should also equate to low compression...
Possibly just one off where compression shouold be lower and plug would be fouled I would think....

What are the conditions of the plugs... Oil wet?

Are you running PODS or stock air box... Not sure of this configuration but on older models, vent tube feeds back to filter box.... If box, filled with oil somehow?

Just some thoughts all....

OMR

Just an observation...I had a brand new KZ1100B2 (aka 1982 GPz1100) that I kept for about 30,000 miles...ran great, never fouled plugs but drank a quart of oil every 500 miles, like clockwork. Talked to a number of Kawasaki people while this was happening and their consensus was that there were design issues with the rings/pistons that allowed high oil use. I was not alone in this and others with J motored bikes reported, at that time, high oil consumption.

Yes, the first of this generation of engine a lot of them had this problem. It might help to maintain your oil level at the lower mark instead of the full mark. This reduced my comsumption by 1/2 or more.

To all who replied,
Thanks!
So far I have not been able to detect any signs of oil burning or leaking. I rebuilt all of the carbs this spring and the airbox was clean. No exhaust smoke that looks suspect. A little white when starting but I have the enrichment ON so I figure it's rich burning, it stops when I close the valve. Also, the bike only had 2.5K on it when I bought it, it had the original tires on it! So, I suspect it didn't have any engine work done to it and I have only changed the valve cover gasket because of seepage. I now have 13K+ on it. This oil consumption has been going on all along. I did put on a V&H 4-1 because the original exhaust sounded so wimpy (can you say Gold Wing?) and it was also pretty rusty.
It has to be going out the pipe but it doesn't smoke, I was 10-40 Castrol GTX and I tried their high mileage version to try to reduce the consumption. I suppose I should use 20-50 MC oil. Anyone used the Penzoil brand?
Many thanks!