Man you hit on the biggest scam in the world. The 3000 mile oil change was a good idea back in the days of low detergent (was HD at the time) oil and leaded gas. When unleaded gas came along, oil didn't get dirty like it used to but the oil companies didn't bother telling you about it. See, for all those well wishing folks that still do the 3000 rather than 6000 to 7500 (like Ford recommends under normal driving conditions) the oil companies DOUBLE their sales. Now with all the billion barrels of oil mined daily and a percentage of that being engine lube, you think that they are going to look that gift horse in the mouth? Not in our lifetime. ----- ----- ----- ----- Bought a Chey Nova 2 door, used. Don't remember the year but it was back when they built Nova's with straight 6 engines, or if you got the V8, you had to jack up the engine to change the last 2 spark plugs. Had what GM called an "integrated head" where the intake manifold was cast as part of the head. It cracked and put antifreeze in the cylinder. Happened on the way to work one morning in stop and go freeway traffic. Scared the dung outta me as steam came up all around me...anyway limped back home. Took it off and put on a conventional head with the normal in and out manifolds. The previous owner was a 3000 mile buff. When I removed the head and looked down into the cylinders I could still see the crosshatch pattern from honing the cylinder walls when the engine was built. The car had over 150k miles on it..... .I have better things to do with my money. My 2c Mark
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