quote:
Originally posted by hwhite1:quote:
Originally posted by Admin:
To kick-off Noria's new message boards, we're giving an electronic copy of Jim Fitch's new book _How to Select a Motor Oil and Filter_ to the first 10 visitors that register and post a question, tip or case study (relevant and meaningful posts only) to our new boards.
Yes. I've been using extended drains now in my personal vehicles since 1993. Originally I was going 10,000 miles with oil analysis (10w30) on a 1990 Toyota 2.2L 4 Cyl. Sold truck at 349,000 miles. Each oil change the interval was increased by 5,000 miles and oil analysis was performed. Eventually I was at 40,000 mile intervals. In 2000, I purchased a 1998 Toyota with the 3.4L 6 Cyl.; it was a returned lease vehicle with 36K miles on it. I now have 129,000 miles on it and I have now increased my intervals to 35,000 miles (0w-30) until installing a by-pass system at 111,000 miles. I now have 18,000 miles on this oil change but have not sampled the oil yet. I'm curious to see how it performs but I'm not planning to pull the sample until June of 2004; I should have approximately 40,000 on that oil at that point in time. My wife's vehicle is a 1995 Toyota Fore-Runner (10w30)with 151,000 miles and has the oil changed in it every 12 mths. simply because she only drives 8,500 / yr. I was very skeptical early on because I had always used petroleum oils and didn't even know what oil analysis was but my brother-in-law is a chemical engineer and told me about this and I decided to try it after listening to him for about 2 yrs.; I figured the only way to get him to shut up was buy the stuff. haha I've had great results using this drain interval method.
Does anyone have real experience with "extended drain intervals" with synthetics?
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