Oil Blow-By on a 258 6 cylinder

It is using about a quart every 200 miles and previously was not. The rear main does leak a little but not that much.We will try the Pennzoil 15W40 the next time we change the oil. We also just installed a new carburator just before the MSD. First we thought gas may have got in the oil and thinned it down but I don't know. Looks like we will be rebuilding this summer if we can not get it slowed down. Is "Restore" worth using as a temporary fix until it can be re-built??
Thanks for the feedback, Dave C.

I would have to agree with Abus, if you have good compression, I don't think you have blow-by. You might want to check your PCV system though, if it is plugged up, it will cause oil leaks.

Abus, thanks for the e-mail. We will definitly try the valves first.

Fred, funny you should mention PCV. This is how the oil got gas in it. The PCV hose collapsed causing the engine to run terrible and gas got in the oil. My son replaced the hose but not the PCV, I think? We will replace this and verify it's not blocked, before looking at the valve job.

Thanks alot, three heads are better than one. Especially one that is somewhat ignorant but learning.

Dave,
If you are getting gas in the oil, you may also want to replace the fuel pump, assuming that you have the mechanical pump on the engine. If the diaphram starts leaking on those, it will dump gas into the oil; not good!

Good luck!
Fred

Good point! I was wondering how the gas got in the oil. Yes, it is mechanical and was on the list to replace soon. I was thinking about going to an electric.

Thanks for the info!