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Thread: 7.5 professional rebuild 15K miles no oil pressure at hot idle
          
   
   

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  1. 02-14-2016 09:23 AM #1
    36 sedan's Avatar
    36 sedan
    36 sedan is offline CHR Member
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    american canyon
    Car Year, Make, Model: 36 Ford Sedan, 23 T Bucket
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    Ive also heard that newer synthetic oils are not good in older designed motors as it is too slick and thin for their bearing designs and doesn't hold oil pressure well in them.
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  2. 02-14-2016 09:30 AM #2
    twolaneblacktop
    twolaneblacktop is offline CHR Member
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    lebanon
    Car Year, Make, Model: 65 Nova big tire car 73 Nova big block
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    no synthetic here. I made that mistake before. Flat tappet engines do not do well with that stuff even after break in. I think that is what happened to the Ford replacement engine that was in the truck when I bought it.
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