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Old 07-30-2005, 11:21 PM
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Question "WHY" Does Old Oil Slow Engines..?

Hey guys, i seriously notice on my car now rather then smaller engine cars i had in the past. I have a 95 ford tbird with a 4.6 V8 that has just over 133k on the ticker. As soon as i get past 2000 miles, after a good oil change, it seems as if i lose atleast 15-25 hp...especially torque.

Example, after a oil change, i can go WOT from a stop and get a good 2 second chirp (no smoke)....after 2000 miles or so, i punch it...nothing.. Just a slow windup.

Is it that the oil gets thinner and loses it's lubricity..? But why would that hinder HP and TQ..? BTW, i do use 4 qt's 10W30 castrol and 1 qt Lucas Oil Stabilizer...works good.

BTW, does it have something to do with compression..?
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