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<p>[QUOTE=&quot;Ridgeline, post: 8168661, member: 77050&quot;]AN oil change doesn&#039;t mean that the sump and galleries are cleaned out and many times if you put it on a dyno, pull the oil after all the oil is circulated under a load, you will get a good snapshot of the condition of the engine. </p><p><br /></p><p>I&#039;ve done this with a lot of used trucks where the oil has been changed, I always get indicators popping up when it is done that way and have rejected trucks with fuel in the oil or coolant leaks in the oil that cropped up after a dyno run. Another one that came up is copper levels went up sharply after a dyno run to indicate that the bearings were worn. I saw this in a fleet of trucks I was going to purchase, they did PM on all of the trucks which raised a flag and each one was dyno&#039;d, producing 80% of full power but when the OAs came back, the before and after results were quite different, and this was with each one on the dyno for just a little while. </p><p><br /></p><p><br /></p><p><br /></p><p>Not likely thing will be changed. The service reports tell you if there is an on-going issue with something on the truck, seen it happen before but I have yet seen any evidence of &quot;doctoring&quot;. </p><p><br /></p><p>The ECM dump is done to see if there are anomalies, like hours and miles being off, past history does show up with a complete report and so does the ECM change out which happens a lot. </p><p><br /></p><p>Again putting the truck on a dyno and letting error code show up with the ECM is a good thing, not to be ignored. </p><p><br /></p><p><br /></p><p><br /></p><p>I would think you can but 80% of the drivers out there can not judge the truck, they don&#039;t have the skills to understand what&#039;s good and what isn&#039;t. There is something about a driver becoming apathetic when they drive a vehicle for a while, they get used to the feel or rhythm of the truck. </p><p><br /></p><p><br /></p><p><br /></p><p>I disagree with this, part of buying has to do with the Due Diligence of buying, which includes steps to reduce the risk of problems and/or breakdowns. </p><p><br /></p><p>My goal isn&#039;t to bash you but to add to the advice on how to buy a truck and not get screwed, I&#039;ve seen it happen so much that I am surprised most still ignore the advice of others who&#039;ve done it for years.[/QUOTE]</p><p><br /></p>

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