Old 05-14-03, 08:26 PM
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Picked up a 85 GMC Sierra. body is excellent shape. Has 4.3 engine with 192000 miles on it and it smokes alittle no engine noise. Is there any kind of oil additative I could use to help prolong the engine another 25000 miles before replacing the engine. Thanks
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Old 05-15-03, 01:17 AM
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Location: Texas
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Just buy quality oil and keep it full, and when it starts making noises turn up the radio. Start saving now for a crate 350.
Old 05-15-03, 03:56 AM
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If it smokes, the motor is on borrowed time. Just maintain it the best you can and run it till you hear the rod go through the bottom end. Then replace the engine .

No fix in a can. You can use slightly thicker oil, but that's masking the real problem.

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