Actually it was a series of fixes. I had 2-3qts/5000 miles oil consumption in 2003 (made in 2002) Corolla since 6X,XXX miles (forgot the exact number) after a steady diet of dino oil changes every 4000-5000 miles/6 months.
I did a couple of MMO piston soaks that would help for 2000 miles or so and consumption would come back. Than, last summer i did an extra long multi-week MMO soak that partially helped and cut consumption in half. I also started filling oil above the dipstick mark as per the Toyota's TSB for this engine.
Before next oil change this last fall, I did Kreen piston soak and flush and started using Maxlife oil. Small consumption lasted for the first 1000 miles and disappeared since. Time will tell but so far so good (no visible consumption whatsoever) several K miles into the OCI.
Next oil changes will be synthetic to prevent the oil consumption from reappearing.
Not sure what exactly was the fix, maybe a combination, but it worked. MMO piston soaks themself seemed least effective.
I did a couple of MMO piston soaks that would help for 2000 miles or so and consumption would come back. Than, last summer i did an extra long multi-week MMO soak that partially helped and cut consumption in half. I also started filling oil above the dipstick mark as per the Toyota's TSB for this engine.
Before next oil change this last fall, I did Kreen piston soak and flush and started using Maxlife oil. Small consumption lasted for the first 1000 miles and disappeared since. Time will tell but so far so good (no visible consumption whatsoever) several K miles into the OCI.
Next oil changes will be synthetic to prevent the oil consumption from reappearing.
Not sure what exactly was the fix, maybe a combination, but it worked. MMO piston soaks themself seemed least effective.