I bought this car off the showroom floor with about 1,200 miles on it. Since just past 70,000 miles or so, this car has been using more and more oil between changes. It now appears to be up to about 1 quart per thousand miles, maybe just 800 miles. I don’t see any sign of a leak. There now are 201,000 miles on this engine. The V-tech solenoid had to be replaced about 30,000 miles back. Timing chain has never been replaced; nothing else major has been repaired. Last new PCV valve was put in about 30,000 miles back. It didn’t seem to slow down oil consumption. This oil problem is the only problem with this car, except for the V-tec before, and some rattles. Otherwise it is as reliable as any car I’ve ever owned, and I’ve been around a while.
I’ve read many blogs and other web pages on this, and it’s a common problem with this particular Honda engine. Is there any chance that this oil usage is something besides worn piston rings? Any ideas what it could be ? Some people seem to think it might be worn valve seals, and/or worn cam shaft seals? how expensive is that to get fixed? If it’s any of these things, is there really any practical solution other than a new engine, or maybe a rebuilt?
Short of thousands of $ in repair costs, would a different type of oil help to at least reduce oil consumption? I read some people saying to stay away from synthetic (why would that matter?); some talk about oil treatments; one honda service manager says he puts good old STP in a high mileage Honda he owns. I tried that with this car, just one application, and I didn’t notice any drop in consumption, but I drive a LOT, in all types of conditions, so I don’t know that I gave it a real chance to work. Why would that kind of stuff help, anyway? In such an old engine, if I experiment with these, is there any chance of doing further damage to the engine? For that matter, would switching to 5W-30 or maybe a 10-weight, possibly slow down this excessive oil usage?
I really don’t want to buy a new car. Any ideas?