Last post on Mar 15, 2002 at 4:38 PM
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Buick Century, Oil
#18 of 19 as fate would have it
Mar 11, 2002 (5:34 am)
The light came on when I started the Grand AM 2002 to drive onto the ramps to change the oil on my schedule - talk about coincidence. Got just shy of 4K and six months on the factory oil, 40/60 city/highway. The ECOTECH engine uses a paper oil filter placed in a plastic canister housing which was pretty clean. Expect that will be about the cycle for this car, about every 6 months instead of the 1 year interval. I have the luxury of just following the light since the car is leased; can post results, albeit pretty infrequently.
#19 of 19 break-in with synthetic oil
Mar 15, 2002 (4:38 pm)
Re: Break-in with synthetic.
I switched to synthetic when I bought my car in 1984 after the first 3,000 miles. No problem. However, after 30,000 miles, I noticed a fairly abrupt improvement in mileage and to a lesser extent smoothness. It took me a while to realize that the car had finally broken in.
When the oil and car manufacturers say that there is no "break-in" required, they mean that the strict limitations on speed, use and driving habits that prevailed in the old days are no longer required. I don't think that they mean that your car won't drive better after a few thousand miles.
I changed the oil every 6,000 miles. My car finally wrecked at 270,000 miles but didn't burn oil, and ran very smoothly.
My suspicion is that 6,000 miles is quite conservative. The people who change the filter and not the oil are probably optimizing the benefit of synthetic oil, although my feeling is that if you have to jack with the filter (which you do, whether or not you use synthetic) you might as well change the oil too.