synthetic oil

GTconnor said:

Yes i do realize that, and i know i change it VERY early. But i know for a fact that my engine is going to last a very long time doing it this way

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At least that's what you believe anyway, right?

Switching out your oil early isn't going to make your engine last any longer than it would changing it within the schedule Ford recommends. A scheduled oil change, is a scheduled oil change. And fresh oil isn't going to protect any better than an oil with only a couple thousand miles on the clock when its formulated to last much longer. Hell, excessive early morning cold starts, short duration start and stop trips, high/low climate temps and inconsistencies in manufacturing would negate any advantage you might think you're gaining by changing out your oil so early.....so stop sweating it!

If there is ever any doubt in your mind about this fact, just consider all of the modular powered Taxi Cabs, Police Vehicles running the roads today. They spend endless hours at idle (which is harder on your engine more than anything) and then rack up hundreds of thousands of miles when taxi services buy them up. I know of taxi companies that have gone 30,000km between oil changes and their cars are still running strong with 200,000 and 300,000km on the clock....and these cars have never seen anything buy conventional dino oil.

GTconnor said:

Why ford says change your oil at 7500 miles i will never understand, gasoline pollutes the oil and it looses its lubrication over time.

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What you fail to take into account here is how gasoline and additives added to engine oils have changed over time…..not to mention the engines themselves.

Engine assembly tolerances are much more consistent and precise than they were in the cars build between the 50's-90's and you also need to consider a lot of this "old school" mind set originates from mechanics who lived through an era where 50,000-miles on an engine was considered a lot. Leaded gas was all that was available and oil refinement process and formula's were nowhere near what they are today.

Gone are the days of archaic carbureted induction, or early generation computer controlled fuel delivery systems. Modern EFI air/fuel deliver methods are far more precise now a days than it was back when you had to worry about fiddling with jets and the like. No longer is seeing an optimal 14.7:1 A/F ratio dependant on running your engine in an environment with ideal temperature, altitude and barometric pressure. A slew of computer controlled sensors connected to advance ECU calibrations and variable cam and ignition timing now control that environment for you.

Let’s put it this way….you may not know what Ford was thinking, but they certainly do. Do you think they would risk having to perform millions of dollars in warranty repair if they though 7,500-mile oil change intervals weren’t sufficient? Especially now, considering they’ve increase the old 3/36,000-mile power train warranty to a standard 5-year, 60,000-mile one on top of it all?

Like I said, it’s your money to flush….but make no mistake. You’re basing your decision to do so on unfounded paranoia, and nothing else.