In Reply to: Re: How much longer will synthetic.... posted by Bob ///M3 on September 12, 2000 at 08:53:22:
In the last almost 2,500 miles I have not consumed any more oil than the "thickness" (not width) of the dipstick. Virtually no oil consumption at all in almost 2,500 miles. As reported, I'm using Amsoil 0W-30 oil.
If you recall, When I bought the car, i was using 1 at /1200 miles...At about 3K miles, I switched to synthetic (mobil1 5w-30), and I continued to consume at the same rate...At 7K, I switched back to conventional, which I've used since...I'm now at 18K miles, and about due for my INspection I. I plan to have the dealer switch me back to BMW branded synthetic.
I'm thinking about keeping that synthetic in for the entire duration between lighted service intervals, or , about 10K miles. All synthetic mfgs will tell you their oil is easily able to last far beyond that...Now, consider that i'm now using about 1 qt / 2K miles...So, even though I may go 10K miles between changes, that includes approx 5 new qts over the period. In addition, I'm thinking about changing just the filter every 5K miles. I believe that this regimen should protect the engine very well.