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oil use
my 05 does not use a drop of oil, I change it every 2 to 3 thousand miles and I use only ROYAL PURPLE oil....GM made a big mistake by putting in full synthetic oil at the factory,, Full Synthetic oil will NEVER let a new engine break in properly..on the day I took delivery of mine [ it had 4 miles on it ] I had the dealer change the oil and used MOBILE ONE non synthetic oil.. I did not put full synthetic oil in it till it had over 5000 miles on it
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