Excessive oil consumption

May 20th, 2003, 09:55 AM

I purchased a 98 Nissan Maxima 70K miles several months ago. Driving around town is great – good gas mileage and NO oil consumption. I just took it on two trips out of town. On trip #1 I drove several hours then pulled off the freeway and spent 40+ seconds at a stop light. When I started up a cloud of blue smoke completely covered the cars in back of me. This happened every time I would drive for several hours then stop and start again. On that trip the car used 1 qt every 250 miles !!!!! I got home checked things out (no codes from the computer) and replaced a stuck PCV valve. Two weeks of driving around town – no smoke, no oil consumption. Last weekend on another long trip – same problem, smoke after freeway driving, oil consumption 1 qt = 250 miles. HELP! Any ideas of what to try?

**Slurppie** · May 20th, 2003, 04:11 PM

If you burn oil after the car has been sitting for a period of time, I would think its the valve guide seals. Over time , oil will run down into the cumbustion chamber if the seals fail.

May 20th, 2003, 08:19 PM

Quote:

Originally posted by Slurppie
If you burn oil after the car has been sitting for a period of time, I would think its the valve guide seals. Over time , oil will run down into the cumbustion chamber if the seals fail.

Yes, your right. But that that is not the problem I am having. My consumption is happening while driving at steady freeway speeds. Never around town, and never while sitting (like overnight or in a parking lot).

**Slurppie** · May 24th, 2003, 05:36 PM

Have you performed a compression test yet to rule out rings? How does the new PCV valve look right now?