oil consumption on 2002 Chevrolet Prizm

Are there any cheap/reasonable/simple options to reduce oil consumption such as using a onetime/long-term oil additive or convert to synthetic? I’ve owned the vehicle since it had 108,000 miles on it. Oil consumption then was 1 qt. every 3,000 miles. The engine now has 157,000 miles on it and currently uses 1 qt. around 2300 miles on a fresh oil change. It uses the 2nd qt. by 4000 miles which is when I change the oil & filter. I always use a quality conventional oil that meets API SM, SL Service Classification and manufacturers' U.S. warranty requirements. It also meets or exceeds ILSAC GF-4. I’ve tried several different brands but consumption continues to increase. There are no leaks. I use this vehicle for an 80 mile daily commute with 98% highway speeds. I want to avoid costly (internal engine) repairs. Would using full synthetic help after a few oil changes? If so, what are the precautions I should follow for the conversion to synthetic?

by in Corpus Christi, TX on November 29, 2010
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2 answers 3 comments
ANSWER by , November 29, 2010
use a 20w50 oil lucas oil stablizer 1/2 qt to oil change .change pcvalve make shur vac line coming out of valve cover is open crankcase fiter is good make shur line is nt colaped
COMMENT by , November 29, 2010
Are you saying use 20w50 and 1/2 qt. Lucas stabilizer? Won't 20w50 increase fuel consumption? Is Lucas a onetime/long term solution or needed each oil change?
ANSWER by , November 30, 2010
Most car manufacturers will tell you consuming 1 qt per 1000 miles is acceptable for a new car. So technically yours falls well within that limit averaging 1 qt per 2000miles. IMHO even 1 qt per 1000 miles is a bit high for any car. My 1999 Camry also a Toyota like your Prism (Corolla)any uses less than .25 qts. per 3000 miles. Just be glad you use less then these people, high oil consumption is a know problem with your car: http://www.carcomplaints.com/Chevrolet/Prizm/2001/engine/excessive_oil_consumption.shtml
COMMENT by , December 01, 2010
I agree. But I wanted to educate myself on any/all cost effective options out there to reverse the trend. I hear about various oil additives but I’m skeptical. I have a strong maintenance background in aviation but the opportunities are not there to “experiment” like you can in the automotive maintenance arena. I’m hoping I can gather enough information to make an educated decision to reverse the trend. Thanks for the input.
COMMENT by , January 12, 2011
Automotive Restore Engine Restore should take care of that. http://www.restoreusa.com/ I've read up on it before and it sounds like a real good product. Also Petrotech 2000 is a real good oil additive to make your engine run well. Don't know for sure that that is a oil user fixer. If it's due to a stuck valve you could try adding a little rislone to the oil. That fixed it on my 89 acura legend when it started burning.