Scotty, I just picked up a 2003 Honda accord four-cylinder automatic as a beater as I have a 70 mile round-trip a day for work. It runs very well. I always go through everything when I buy a used car, change the oil, filters, plugs, etc. even the PCV valve . I used mobile one synthetic And noticed I am using a quart of oil about every 1200 to 1500 miles. The car doesn’t smoke, I don’t see any obvious leaks and I know the old stories about synthetic oil possibly causing gaskets to leak by cleaning up the debris etc. but as I stated I don’t see any obvious oil leaks. I did some research and found that if a car is using oil one of the biggest possibilities is needing to change the PCV valve which if bad can cause oil getting past the rings due to pressure. But as I stated I put a new PCV valve on before I noticed the oil usage. Do you have any other ideas? I think I have about 5000 miles on the synthetic oil ( Plus adding at least 3 quarts over this period). should I get rid of synthetic at my next change?

Comments (4)
No. 1-2
Vox600
Vox600

I can check compression when I get a chance however the car runs great and seems to have plenty of power and idle is smooth. I would think if the rings were bad enough to cause that type of oil loss the car would be smoking.

Techsus
Techsus

Do this first. Perform this test DIY, save money, buy peace of mind: WET DRY ENGINE COMPRESSION TEST How to Tell if Your Car's Engine is Bad by Uncle Scotty: https://www.youtube.com/watch?v=nABx4GwhV68