Last post on Mar 15, 2002 at 4:38 PM
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Buick Century, Oil
#13 of 19 Re: adc100
Mar 10, 2002 (10:22 am)
What's your thought about blending conventional and synthetic? I was thinking of going 5 quarts conventional to 2 quarts synthetic, probably all Mobil. I'll probably still do the 3k changes just because I'm anal and have access to a hydraulic lift.
Mar 10, 2002 (12:49 pm)
My opinions are quite slanted because I just can't stand the thought of using any conventional oil-period. Your plan though is the next best option to my way of thinking. Some extra benefits of the synthetic and not wasting extra money on blends. I used to do as you are doing now, but the sheer number of vehicles (extended family) I have taken responsiblilty for (my choice) just doesn't allow that option.
#15 of 19 my original question #1
Mar 10, 2002 (3:19 pm)
was put up because this is the first vehicle (2002 century) we have owned with a oil monitor system. My vehicle is a 1997 Z71 Siverado CK1500 4WD. The severe service interval is listed in the manual as 3000 miles. I looked at the mobil 1 site and they say to change oil at the interval listed by the vehicle manufacturer. Going by Mobils own info I will just keep using dino oil in my truck as it's going good after 55K. GM mentions nothing in the manual about dino or synthetic so I assume they recommend using dino oil and changing it within using 2 tanks of gas of when the light comes on. I will also talk it over with the service guy as I have all my work done by the dealersip shop. As far as the post aways above about breakin oil, I have purchased new vehicles in 95, 97, 99, and 2002 and have always been told to just do the first change at 3000.
#17 of 19 Idiot Light
Mar 10, 2002 (8:24 pm)
I have great confidence in the new electronic engines that monitor and give best prediction of oil change interval.
Miles driven means absolutely nothing to the engine;, the load factor, rpms, run time, and amount of fuel burned are more inportant and better indicators of when the oil needs changed. 3000 miles is the most conservative figure, under severe driving conditions, which 90+% do not operate under. However, I do not blame anyone for changine at 3000 on dino or 5000 on syn. it is cheap insurance, but I just feel an overkill when your engine can tell you when ideal is...
#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.