Date: Sun, 26 Mar 2000 11:51:25 +0200
From: Mikael <>
Subject: Re: oil degrading over time

Hmm. The oil issues really seem to get the fanatics out in force. It is almost like the audiophiles that chase the last 0,0001% distortion in the amplifier when the speakers have 1-2%..... The oil itself degrades extremely slowly over time at room temperature What happens is that the combustion leaves small amounts of agressive chemicals and solid waste in the oil. These build up slowly over time especially if you often use your car for short trips and if it doesent use any oil. However changing more then every 6000 miles or once a year if that comes first is unnecessary and a waste of money for most people. If you feel good inside to see the clear stuff on the dipstick. Ok . But it does not do much for your vehicles longevity. If you feel an urge too be on the safe side, buy good quality oilfilters and not the "nonames" and buy a high quality synthetic oil since they contain high quality additives that neutralize the agressive chemicals. Among the best ones is Mobil Synthetic. Also use a mechanic that you trust too give you what you pay for. Very tempting too put in cheapo oil instead of the expensive stuff. PS: I have met people that change their oil every 600 miles. Go figure... "r. weissman" wrote: > Have a saab which does not get much milage due to my biz travel. I > have the oil changed every 3k mi or so (name brand regular, not > synthetic). Regardless of milage, what the max amount of time > suggested to use oil before changing? > thanx > rw

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