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1997 Chevy Astro burns a lot of oil

Tiny
2CP-ARCHIVES
  • MEMBER
  • 1997 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 60,000 MILES
1997 Chevy Astro Van mileage: 60,000. My van is equipped with a trailer towing package, 410 rear end etc. When towing I burn a quart of oil every 100 miles or so. It was much worse, but I switched to a synthetic 20-50 wt oil for the summer. When not towing it does not use any oil? It is not leaking and there is no sign that it is burning the oil. (The trailer does not get a coat of oily film like a previous vehicle). I do not do a lot of traveling, maybe 600 miles per year towing. Any suggestions?
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Monday, November 8th, 2010 AT 9:13 PM

1 Reply

Tiny
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  • MEMBER
  • 4,542 POSTS
What may be occurring is that in normal driving, without a trailer; the engine breather system can handle the "blow by that is generated by the piston rings (60,000 miles on them). When you tow a trailer, you are obviously working the engine harder, which causes more blow by. This may be overpowering the engine breathers forcing oil into the engine intake system. This is what burns the oil. Check your breathers and the PCV valve to make they are functioning properly.
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Monday, November 8th, 2010 AT 9:20 PM

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